Vibe 2006-2007

1.8L L4 VIN 8 Std 3

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Trouble Code: P0340



Camshaft Position (CMP) Sensor Circuit

Possible Causes:

Check for any of the following conditions:



The CMP sensor output may be affected by temperature. Check the sensors operation and internal resistance at various temperatures. The CMP sensor resistance when cold should be between 835-1,400 ohms at -10 to 50°C (+14 to +122°F). The CMP sensor resistance when hot should be between 1,060-1,645 ohms at 50-100°C (122-212°F).
 
The CMP sensor performance can be checked with a DMM and a scan tool. The AC voltage output of the CMP sensor, as measured with a DMM across the sensor electrical terminals, is approximately the same as engine speed. Run the engine at several different engine speeds and compare the numerical value on the scan tool with the numerical voltage reading on the DMM. If the reading of the DMM and the scan tool are not nearly equal, check for a faulty sensor or signal rotor.
 
A DTC P0340 that sets while driving and checks OK may be caused by inadequate CMP sensor circuit shielding. Check that the CMP sensor circuit is properly shielded and that the drain wire is fastened securely to ground.
 

Trouble Code: P0340



Camshaft Position (CMP) Sensor Circuit

Possible Causes:

Check for any of the following conditions:



The CMP sensor output may be affected by temperature. Inspect the sensors operation and internal resistance at various temperatures. The CMP sensor resistance when cold should be between 835-1,400 ohms at -10 to +50°C (+14 to +122°F). The CMP sensor resistance when hot should be between 1,060-1,645 ohms at 50-100°C (122-212°F).
 
The CMP sensor performance can be checked with a DMM and a scan tool. The AC voltage output of the CMP sensor, as measured with a DMM across the sensor electrical terminals, is approximately the same as engine speed. Run the engine at several different engine speeds and compare the numerical value on the scan tool with the numerical voltage reading on the DMM. If the reading of the DMM and the scan tool are not nearly equal, inspect for a faulty sensor or signal rotor.
 
A DTC P0340 that sets while driving and checks OK may be caused by inadequate CMP sensor circuit shielding. Check that the CMP sensor circuit is properly shielded and that the drain wire is fastened securely to ground.
 

Trouble Code: P0341



Camshaft Position (CMP) Sensor Performance

Possible Causes:

Check for any of the following conditions:



The camshaft position (CMP) sensor output may be affected by temperature. Check the sensors operation and internal resistance at various temperatures. The CMP sensor resistance when cold should be between 835-1,400 ohms at -10 to +50°C (+14 to +122°F). The CMP sensor resistance when hot should be between 1,060-1,645 ohms at 50-100°C (122-212°F).
 
The CMP sensor performance can be checked with a DMM and a scan tool. The AC voltage output of the CMP sensor, as measured with a DMM across the sensor electrical terminals, is approximately the same as engine speed. Run the engine at several different engine speeds and compare the numerical value on the scan tool with the numerical voltage reading on the DMM. If the reading of the DMM and the scan tool are not nearly equal, check for a faulty sensor or signal rotor.
 
A DTC P0341 that sets while driving and checks OK may be caused by inadequate CMP sensor circuit shielding. Check that the CMP sensor circuit is properly shielded and that the drain wire is fastened securely to ground.
 

Trouble Code: P0341



Camshaft Position (CMP) Sensor Performance

Possible Causes:



Check for any of the following conditions:

The CMP sensor output may be affected by temperature. Check the sensors operation and internal resistance at various temperatures. The CMP sensor resistance when cold should be between 835-1,400 ohms at -10 to +50°C (+14 to +122°F). The CMP sensor resistance when hot should be between 1,060-1,645 ohms at 50-100°C (122-212°F).
 
The CMP sensor performance can be checked with a DMM and a scan tool. The AC voltage output of the CMP sensor, as measured with a DMM across the sensor electrical terminals, is approximately the same as engine speed. Run the engine at several different engine speeds and compare the numerical value on the scan tool with the numerical voltage reading on the DMM. If the reading of the DMM and the scan tool are not nearly equal, check for a faulty sensor or signal rotor.
 
A DTC P0341 that sets while driving and checks OK may be caused by inadequate CMP sensor circuit shielding. Check that the CMP sensor circuit is properly shielded and that the drain wire is fastened securely to ground.
 

An intermittent malfunction may be caused by a fault in the CMP sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .Repair any electrical circuit faults that were found. Refer to Wiring Repairs .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0351



Ignition Coil 1 Control Circuit

Possible Causes:

Check for the following conditions:



An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

Trouble Code: P0351



Ignition Coil 1 Control Circuit

Possible Causes:



Check for the following conditions:

An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

An intermittent malfunction may be caused by a fault in the ignition coil electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .Repair any electrical circuit faults that were found. Refer to Wiring Repairs .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0352



Ignition Coil 2 Control Circuit

Possible Causes:

Check for the following conditions:



An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

Trouble Code: P0352



Ignition Coil 2 Control Circuit

Possible Causes:



Check for the following conditions:

An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

An intermittent malfunction may be caused by a fault in the ignition coil electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .Repair any electrical circuit faults that were found. Refer to Wiring Repairs .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0353



Ignition Coil 3 Control Circuit

Possible Causes:

Check for the following conditions:



An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

Trouble Code: P0353



Ignition Coil 3 Control Circuit

Possible Causes:



Check for the following conditions:

An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

An intermittent malfunction may be caused by a fault in the ignition coil electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .Repair any electrical circuit faults that were found. Refer to Wiring Repairs .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0354



Ignition Coil 4 Control Circuit

Possible Causes:

Check for the following conditions:



An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

Trouble Code: P0354



Ignition Coil 4 Control Circuit

Possible Causes:



Check for the following conditions:

An interruption of the ground circuit or voltage supply to the ignition coil will prevent a proper ignition event from taking place. A DTC P0351 through P0354 will set if there is a fault in any of the ignition coil circuits.
 
If DTCs P0352, P0353, and P0354 are present, the fault is located in the shared electrical circuits or shared components of the ignition coils.
 
Inspect the ignition coil grounds at G 105 for a clean and tight connection.
 
The scan tool data parameters for Misfire Current Cylinder # are frozen at the time the MIL illuminates when the DTC sets.
 
If no engine misfire is felt when the DTC sets, inspect for a fault in the Ignition Fail-Safe Input circuit.
 
Inspect the noise filter for an internal short or low resistance. The ignition coil may not receive adequate voltage during high load conditions if the noise filter is faulty. A good noise filter will indicate infinite resistance (OL) with a DMM after the capacitor inside the filter is charged up.
 
Unless the ignition key is cycled or the DTCs are cleared, the PCM waits to receive ignition fail-safe signals before providing fuel injector operation.
 

An intermittent malfunction may be caused by a fault in the ignition coil electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .Repair any electrical circuit faults that were found. Refer to Wiring Repairs .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0420



Catalyst System Low Efficiency

Possible Causes:

Check for any of the following conditions:



A contaminated or malfunctioning HO2S can cause inaccurate sensor readings. For checks of the HO2S refer to Diagnostic Aids in DTC P0130 .
 
Observe the HO2S 1 voltage and fuel trim readings with a scan tool. If the HO2S 1 voltage is fixed low, while the fuel trim is constantly high, check the mass air flow (MAF) sensor signal circuit for resistance. High circuit resistance can cause the sensor to read a lower volume of air than actual, resulting in a lean fueling condition. This lean fueling condition can cause the HO2S 2 voltage to be fixed low, causing the DTC P0420 diagnostic to fail.
 
A damaged HO2S wiring harness--Inspect the HO2S wiring harnesses for damage and repair as necessary.
 
If a DTC P0420 is intermittent, driving the vehicle under the conditions outlined in the Inspection/Maintenance (I/M) section can verify whether the fault is present. Refer to Inspection/Maintenance (I/M) Catalyst System Set Procedure .
 



An engine misfire
 
An inadequate secondary ignition voltage
 
Any excessive engine oil or engine coolant consumption
 
A rich engine fueling
 

Trouble Code: P0420



Catalyst System Low Efficiency

Possible Causes:

Check for any of the following conditions:



A contaminated or malfunctioning HO2S can cause inaccurate sensor readings. For checks of the HO2S refer to Diagnostic Aids in DTC P2195 .
 
Observe the HO2S 1 voltage and fuel trim readings with a scan tool. If the HO2S 1 voltage is fixed low, while the fuel trim is constantly high, check the mass air flow (MAF) sensor signal circuit for resistance. High circuit resistance can cause the sensor to read a lower volume of air than actual, resulting in a lean fueling condition. This lean fueling condition can cause the HO2S 2 voltage to be fixed low, causing the DTC P0420 diagnostic to fail.
 
A damaged HO2S wiring harness--Inspect the HO2S wiring harnesses for damage and repair as necessary.
 
If a DTC P0420 is intermittent, driving the vehicle under the conditions outlined in the Inspection/Maintenance (I/M) section can verify whether the fault is present. Refer to Inspection/Maintenance (I/M) Catalyst System Set Procedure .
 



An engine misfire
 
An inadequate secondary ignition voltage
 
Any excessive engine oil or engine coolant consumption
 
A rich engine fueling
 

Trouble Code: P043E



Evaporative Emission (EVAP) System Reference Orifice Flow Insufficient

Trouble Code: P043F



Evaporative Emission (EVAP) System Reference Orifice Flow Excessive

Trouble Code: P0441



Evaporative Emission (EVAP) System No Flow During Purge

Possible Causes:



If DTC P0441 is the only EVAP DTC set, the most likely cause is an inoperable EVAP canister purge valve. Inspect the EVAP canister purge valve carefully for faulty connections and erratic operation.
 
The information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set. If the Freeze Frame data indicates the engine was not running when the diagnostic ran and failed, the fault is probably a leak in the EVAP system. Refer to DTC P0455 .
 
A faulty EVAP canister can cause a DTC P0441 and P0455 to set. The EVAP canister fault may be temperature sensitive. Test the EVAP canister when the canister temperature is similar to the temperature when the diagnostic failed. Refer to Evaporative Emission Control System Diagnosis .
 
An intermittent malfunction may be caused by a fault in any of the EVAP solenoid electrical circuits. Inspect the wiring harness and components for an intermittent condition. Refer to Intermittent Conditions .
 

Trouble Code: P0441



Evaporative Emission (EVAP) System No Flow During Purge

Possible Causes:



If DTC P0441 is the only EVAP DTC set, the most likely cause is a malfunctioning EVAP canister purge valve. Inspect the EVAP canister purge valve carefully for faulty connections and erratic operation.
 
The information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set. If the Freeze Frame data indicates the engine was not running when the diagnostic ran and failed, the fault is probably a leak in the EVAP system.
 
A faulty EVAP canister can cause a DTC P0441 and P0455 to set. Test the EVAP canister for internal passage leaks and restrictions. Also test the canister for the correct operation of diaphragms, check balls, and internal valves. Refer to Evaporative Emission Control System Diagnosis .
 
An intermittent malfunction may be caused by a fault in any of the EVAP solenoid electrical circuits. Inspect the wiring harness and components for an intermittent condition. Refer to Intermittent Conditions .
 

Trouble Code: P0450



Fuel Tank Pressure (FTP) Sensor Circuit

Possible Causes:



If a DTC P0450 is intermittent, road test the vehicle while observing the fuel tank pressure sensor with a scan tool. A momentary reading of less than 0.20 volts may indicate an intermittent short to ground in the sensor input circuit. A momentary reading of more than 4.50 volts may indicate an open in the sensor input or ground circuit.
 
The EVAP system diagnostic can be monitored on the scan tool under the I/M System Information selection. When the EVAP test displays a YES status, indicating that the system diagnostic is completed, check for DTC P0450 in the Last Test Failed screen of the scan tool. If there is no DTC P0450 displayed the EVAP system diagnostic has run and passed, indicating that no malfunction was present this time. DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that the I/M System Information tests only indicate that the test has run, not if the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved.
 

Trouble Code: P0450



Fuel Tank Pressure (FTP) Sensor Circuit

Possible Causes:



If a DTC P0450 is intermittent, road test the vehicle while observing the FTP sensor with a scan tool. A momentary reading of less than 0.2 volt may indicate an intermittent short to ground in the sensor input circuit. A momentary reading of more than 4.5 volts may indicate an open in the sensor input or ground circuit.
 
The EVAP system diagnostic can be monitored on the scan tool under the I/M System Information selection. When the EVAP test displays a YES status, indicating that the system diagnostic is completed, check for DTC P0450 in the Last Test Failed screen of the scan tool. If there is no DTC P0450 displayed, the EVAP system diagnostic has run and passed, indicating that no malfunction was present this time. DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that the I/M System Information tests only indicate that the test has run, not if the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved. Refer to Inspection/Maintenance Evaporative Emission System Set .
 

Trouble Code: P0451



Fuel Tank Pressure (FTP) Sensor Performance

Possible Causes:

Check for any of the following conditions:



Inspect for a skewed or shifted FTP sensor.
 
The EVAP system diagnostic can be monitored on the scan tool under the I/M System Information selection. When the EVAP test displays a YES status, indicating that the system diagnostic is completed, check for DTC P0451 in the Last Test Failed screen of the scan tool. If there is no DTC P0451 displayed the EVAP system diagnostic has run and passed, indicating that no malfunction was present this time. DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that the I/M System Information tests only indicate that the test has run, not if the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved.
 

Trouble Code: P0451



Fuel Tank Pressure (FTP) Sensor Performance

Possible Causes:

Check for any of the following conditions:



Inspect for a skewed or shifted FTP sensor.
 
The EVAP system diagnostic can be monitored on the scan tool under the I/M System Information selection. When the EVAP test displays a YES status, indicating that the system diagnostic is completed, check for DTC P0451 in the Last Test Failed screen of the scan tool. If there is no DTC P0451 displayed, the EVAP system diagnostic has run and passed, indicating that no malfunction was present this time. DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that the I/M System Information tests only indicate that the test has run, not if the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved. Refer to Inspection/Maintenance Evaporative Emission System Set .
 

Trouble Code: P0452



FTP Sensor Low Voltage

Possible Causes:



If a DTC P0122 is also set, the malfunction may be in the reference voltage circuit.
 
If a DTC P0452 is intermittent, road test the vehicle while observing the fuel tank pressure sensor with a scan tool. A momentary reading of less than 0.20 volts may indicate an intermittent short to ground in the sensor input circuit.
 
The EVAP system diagnostic can be monitored on the scan tool under the I/M System Information selection. When the EVAP test displays a YES status, indicating that the system diagnostic is completed, check for DTC P0452 in the Last Test Failed screen of the scan tool. If there is no DTC P0452 displayed the EVAP system diagnostic has run and passed, indicating that no malfunction was present this time. DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that the I/M System Information tests only indicate that the test has run, not if the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved.
 
An intermittent malfunction may be caused by a fault in the sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
 
Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.
 
The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0452



FTP Sensor Low Voltage

Possible Causes:



If a DTC P0452 is intermittent, road test the vehicle while observing the FTP sensor with a scan tool. A momentary reading of less than 0.2 volt may indicate an intermittent short to ground in the sensor input circuit.
 
The EVAP system diagnostic can be monitored on the scan tool under the I/M System Information selection. When the EVAP test displays a YES status, indicating that the system diagnostic is completed, check for DTC P0452 in the Last Test Failed screen of the scan tool. If there is no DTC P0452 displayed the EVAP system diagnostic has run and passed, indicating that no malfunction was present this time. DTCs MUST be cleared in order to view the Current Status of the system diagnostics being performed. Do not forget that the I/M System Information tests only indicate that the test has run, not if the test passed or failed. The Last Test Failed screen must be checked for related DTCs in order to determine the outcome of the diagnostic test involved. Refer to Inspection/Maintenance Evaporative Emission System Set .
 
An intermittent malfunction may be caused by a fault in the sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
 
The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0453



Fuel Tank Pressure (FTP) Sensor Circuit High Voltage

Possible Causes:



If a DTC P0453 is intermittent, road test the vehicle while observing the FTP sensor with a scan tool. A momentary reading of more than 4.50 volts may indicate an open in the sensor input or ground circuit.
 
If a DTC P0453 is intermittent, driving the vehicle under the conditions outlined in the Inspection/Maintenance (I/M) section can verify whether the fault is present. Refer to Inspection/Maintenance (I/M) Evaporative Emission (EVAP) System Set Procedure .
 
An intermittent malfunction may be caused by a fault in the sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
 
Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.
 
The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0453



Fuel Tank Pressure (FTP) Sensor Circuit High Voltage

Possible Causes:



If a DTC P0453 is intermittent, road test the vehicle while observing the FTP sensor with a scan tool. A momentary reading of more than 4.5 volts may indicate an open in the sensor input or ground circuit.
 
If a DTC P0453 is intermittent, driving the vehicle under the conditions outlined in the Inspection/Maintenance (I/M) section can verify whether the fault is present. Refer to Inspection/Maintenance Evaporative Emission System Set .
 
An intermittent malfunction may be caused by a fault in the sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
 
The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 

Trouble Code: P0455



Evaporative Emission (EVAP) System Large Leak Detected

Possible Causes:



A faulty EVAP canister can cause a DTC P0441 and P0455 to set. The EVAP canister fault may be temperature sensitive. Test the EVAP canister when the canister temperature is similar to the temperature when the diagnostic failed. Refer to Evaporative Emission Control System Diagnosis .
 
In order to help locate intermittent leaks, use the J 41413-200 Evaporative Emissions System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity Lamp.
 
A temporary blockage in the EVAP purge solenoid, purge pipe or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
 
In order to improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
Reviewing the Freeze Frame Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
 
For intermittent conditions, refer to Intermittent Conditions .
 

Trouble Code: P0455



Evaporative Emission (EVAP) System Large Leak Detected

Possible Causes:



A faulty EVAP canister can cause a DTC P0455 to set. Test the EVAP canister for internal passage leaks and restrictions. Also test the canister for the correct operation of diaphragms, check balls, and internal valves. Refer to Evaporative Emission Control System Diagnosis .
 
A faulty EVAP canister vent solenoid can cause a DTC P0455 to set. Test the EVAP canister vent solenoid, located in the EVAP vacuum leak pump assembly, for an internal leak. Refer to Evaporative Emission Control System Diagnosis .
 
To help locate intermittent leaks, use the J 41413-200 Evaporative Emissions System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with theJ 41413-SPT High Intensity Lamp.
 
A temporary blockage in the EVAP purge solenoid, purge pipe or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
 
In order to improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
Reviewing the Freeze Frame Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
 
For intermittent conditions refer to Intermittent Conditions .
 

Trouble Code: P0456



Evaporative Emission (EVAP) System Very Small Leak Detected

Possible Causes:



The EVAP control system is required to detect evaporative emission fuel system leaks as small as 0.51 mm (0.020 inch), between the fuel fill cap, and the purge solenoid.
 
A faulty EVAP canister can cause a DTC P0441 and P0455 to set. The EVAP canister fault may be temperature sensitive. Test the EVAP canister when the canister temperature is similar to the temperature when the diagnostic failed. Refer to Evaporative Emission Control System Diagnosis .
 
In order to help locate intermittent leaks, use the J 41413-200 Evaporative Emissions System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity Lamp.
 
A temporary blockage in the EVAP purge solenoid, purge pipe or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
 
In order to improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
Reviewing the Freeze Frame Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
 
For intermittent conditions, refer to Intermittent Conditions .
 

Trouble Code: P0456



Evaporative Emission (EVAP) System Very Small Leak Detected

Possible Causes:



The EVAP control system is required to detect EVAP fuel system leaks as small as 0.51 mm (0.02 inch), between the fuel fill cap and the purge solenoid.
 
A faulty EVAP canister can cause a DTC P0456 to set. Test the EVAP canister for internal passage leaks and restrictions. Also test the canister for the correct operation of diaphragms, check balls, and internal valves. Refer to Evaporative Emission Control System Diagnosis .
 
To help locate intermittent leaks, use the J 41413-200 Evaporative Emissions System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with theJ 41413-SPT High Intensity White Light.
 
A temporary blockage in the EVAP purge solenoid, purge pipe, or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
 
In order to improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
Reviewing the Freeze Frame Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
 
For intermittent conditions, refer to Intermittent Conditions .
 

Trouble Code: P0500



Vehicle Speed Sensor (VSS) Circuit

Possible Causes:

A scan tool should indicate a vehicle speed whenever the drive wheels are turning at a speed of more than 5 km/h (3 mph). DTC P0500 can be falsely set if the engine is brake-torqued in gear. Disregard DTC P0500 if the DTC sets when the drive wheels are not turning. An intermittent malfunction may be caused by a fault in the VSS sensor electrical circuit. Inspect the wiring harness and the components for any of the following conditions:



Any backed-out terminals
 
Any improper mating of terminals
 
Any broken electrical connector locks
 
Any improperly formed or damaged terminals
 
Any faulty terminal-to-wire connections
 
Any physical damage to the wiring harness
 
A broken wire inside the insulation
 
Any corrosion of the electrical connections, the splices, or the terminals
 

Trouble Code: P0500



Vehicle Speed Sensor (VSS) Circuit

Possible Causes:

A scan tool should indicate a vehicle speed whenever the drive wheels are turning at a speed of more than 5 km/h (3 mph). DTC P0500 can be falsely set if the engine is brake-torqued in gear. Disregard DTC P0500 if the DTC sets when the drive wheels are not turning. An intermittent malfunction may be caused by a fault in the VSS sensor electrical circuit. Inspect the wiring harness and the components for any of the following conditions:



Any backed-out terminals
 
Any improper mating of terminals
 
Any broken electrical connector locks
 
Any improperly formed or damaged terminals
 
Any faulty terminal-to-wire connections
 
Any physical damage to the wiring harness
 
A broken wire inside the insulation
 
Any corrosion of the electrical connections, the splices, or the terminals
 

Trouble Code: P0504



Stop Lamp Switch Input Signal to ECM

Possible Causes:



Inspect for proper adjustment of the stop lamp switch. Refer to Stop Lamp Switch Adjustment .
 
Check for intermittents and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 

Trouble Code: P0504



Stop Lamp Switch Input Signal to ECM

Possible Causes:



Inspect for proper adjustment of the stop lamp switch. Refer to Stop Lamp Switch Adjustment .
 
Check for intermittents and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0505



Idle Control System

Possible Causes:



With the engine idling at a normal operating temperature and all accessories OFF, monitor the following parameters on the scan tool:

The IAC Motor Command--25 to 45 percent
 
Engine speed--750 to 850 RPM
 
Electrical load--No
 
Commanded A/C--OFF If any of the above parameters is outside of the typical value as indicated, inspect for the cause and repair as necessary.
 

Inspect the carpet or floor mat for interfering with the free movement of the accelerator pedal.The scan tool can be used to isolate the cause of an intermittent DTC P0505. Engine idle speed can be controlled with the scan tool. Operate the IAC valve with the scan tool while checking for a smooth increase and decrease in engine speed. If engine speed can be controlled, the IAC system is functioning normally.Check for the following conditions:

Any blockage of the air intake system
 
Any blockage of the IAC passage
 
Excessive deposits on the throttle plate or the throttle bore
 
Any large vacuum leaks
 

An intermittent malfunction may be caused by a fault in the IAC sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.If the DTC P0505 does not reset, but a driveability symptom still exists, refer to Symptoms - Engine Controls .
 

Trouble Code: P0505



Idle Control System

Possible Causes:



With the engine idling at a normal operating temperature and all accessories OFF, monitor the following parameters on the scan tool:

TP sensor--8 to 13 percent
 
Engine speed--650 to 750 RPM
 
Electrical load--NO
 
Commanded A/C--OFF
 
Engine load--11 to 20 percent
 
If any of the above parameters are outside of the typical value as indicated, inspect for the cause and repair as necessary.
 

Inspect for an intermittent condition. Refer to Intermittent Conditions .The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.If the DTC P0505 does not reset, but an idle quality symptom still exists, refer to Symptoms - Engine Controls .
 

Trouble Code: P0511



Idle Air Control (IAC) Valve Control Circuit

Possible Causes:



The scan tool can be used to isolate the cause of an intermittent DTC P0511. Engine idle speed can be controlled with the scan tool. Operate the IAC valve with the scan tool while checking for a smooth increase and decrease in engine speed. If engine speed can be controlled, the IAC system is functioning normally.
 
An intermittent malfunction may be caused by a fault in the IAC sensor electrical circuit. Inspect the wiring harness and the components for an intermittent condition. Refer to Intermittent Conditions .
 
Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.
 
The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.
 
If the DTC P0511 does not reset, but a driveability symptom still exists, refer to Symptoms - Engine Controls .
 

Trouble Code: P0560



System Voltage

Trouble Code: P0571



Brake Switch Circuit 1

Possible Causes:

A scan tool should indicate the state of the stop light switch. An intermittent malfunction may be caused by a fault in the stop lamp electrical circuit. Inspect the wiring harness and the components for any of the following conditions:



Any backed-out terminals
 
Any improper mating of terminals
 
Any broken electrical connector locks
 
Any improperly formed or damaged terminals
 
Any faulty terminal-to-wire connections
 
Any physical damage to the wiring harness
 
A broken wire inside the insulation
 
Any corrosion of the electrical connections, the splices, or the terminals
 

Trouble Code: P0571



Brake Switch Circuit 1

Possible Causes:

A scan tool should indicate the state of the stop light switch. An intermittent malfunction may be caused by a fault in the stop lamp electrical circuit. Inspect the wiring harness and the components for any of the following conditions:



Any backed-out terminals
 
Any improper mating of terminals
 
Any broken electrical connector locks
 
Any improperly formed or damaged terminals
 
Any faulty terminal-to-wire connections
 
Any physical damage to the wiring harness
 
A broken wire inside the insulation
 
Any corrosion of the electrical connections, the splices, or the terminals
 

 
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