Cobalt 2006-2008, G5 2007

2.4L L4 VIN B Auto 5

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Trouble Code: P0455



Evaporative Emission (EVAP) System Large Leak

Possible Causes:



A loose, missing, incorrect, or damaged fuel fill cap may cause this DTC to set.
 
To help locate intermittent leaks, use the J 41413-200 Evaporative Emission 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 . Introducing smoke in 15-second intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
 
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 Failure 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.
 
A condition may exist where a leak in the EVAP system only exists under a vacuum condition. By using the scan tool Purge/Seal function to create a vacuum, seal the system and observe the FTP parameter for the vacuum decay, this type of leak may be detected.
 
If a small leak is difficult to find, it may be necessary to remove the EVAP components and leak test them one at a time.
 

Trouble Code: P0455



Evaporative Emissions (EVAP) System Very Small Leak Detected

Possible Causes:



Damaged EVAP purge solenoid
 
Damaged EVAP vent valve or EVAP canister
 
Incorrectly routed, kinked, or damaged EVAP pipes and hoses
 

Trouble Code: P0456



Evaporative Emission (EVAP) Purge Solenoid Control Circuit Low Voltage

Possible Causes:



EVAP purge solenoid control circuit for a shorted to ground.
 
EVAP purge solenoid shorted to voltage or an open/high resistance
 
Faulty EVAP purge solenoid.
 
ECM has failed
 

Trouble Code: P0458



Evaporative Emission (EVAP) Purge Solenoid Control Circuit High Voltage

Possible Causes:



EVAP purge solenoid control circuit for a shorted to ground.
 
EVAP purge solenoid shorted to voltage or an open/high resistance
 
Faulty EVAP purge solenoid.
 
ECM has failed
 

Trouble Code: P0459



Fuel Level Sensor High Input

Possible Causes:



Fuel level sensor signal circuit is shorted to system power
 
Fuel level sensor ground circuit is open
 
Fuel level sender is damaged, binding or not aligned properly
 
ECM has failed
 

Trouble Code: P0461



Fuel Level Sensor Circuit Performance.

Trouble Code: P0461



Fuel Level Sensor Circuit Performance

Trouble Code: P0462



Fuel Level Sensor Circuit Low Voltage.

Trouble Code: P0462



Fuel Level Sensor Circuit Low Voltage

Trouble Code: P0463



Fuel Level Sensor Circuit High Voltage.

Trouble Code: P0463



Fuel Level Sensor Circuit High Voltage

Trouble Code: P0464



Fuel Level Sensor Circuit Intermittent

Possible Causes:



Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same freeze frame conditions, i.e. RPM, engine load, vehicle speed, temperature, etc. This will isolate when the DTC failed.
 
Refer to Testing for Intermittent Conditions and Poor Connections .
 
If the DTC sets without a refueling event, refer to Fuel Gage Inaccurate or Inoperative .
 

Trouble Code: P0464



Fuel Level Sensor 1 Circuit Intermittent

Trouble Code: P0480



Cooling Fan Relay 1 Control Circuit Malfunction

Possible Causes:



If the condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 
Review the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed. This may help determine how often the condition that caused the DTC to be set occurs.
 

Trouble Code: P0480



Cooling Fan Relay 1 Control Circuit

Trouble Code: P0481



Cooling Fan Relay 2 Control Circuit Malfunction

Possible Causes:



If the condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 
Review the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed. This may help determine how often the condition that caused the DTC to be set occurs.
 

Trouble Code: P0481



Cooling Fan Relay 2 Control Circuit

Trouble Code: P0482



Cooling Fan Relay 3 Control Circuit Malfunction

Possible Causes:



If the condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 
Review the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed. This may help determine how often the condition that caused the DTC to be set occurs.
 

Trouble Code: P0496



Evaporative Emission System Flow During Non-Purge

Trouble Code: P0496



Evaporative Emission (EVAP) System No Flow During Purge

Possible Causes:



Fuel filler cap is very loose, missing or the wrong part
 
Fuel tank, fuel filler neck or fuel sending unit 'O' ring is leaking
 
Fuel tank pressure sensor is damaged, disconnected or it failed
 
Fuel tank vapor line(s) is clogged, damaged or disconnected
 
Purge valve vapor line is clogged, damaged, or disconnected
 
Purge solenoid is not opening (it may be damaged or sticking)
 
Vent solenoid is not closing (it may be damaged or sticking)
 
ECM has failed
 

Trouble Code: P0498



Evaporative Emission (EVAP) Vent Solenoid Valve Control Circuit High Voltage

Possible Causes:



Vent solenoid control circuit is open or shorted to ground
 
Vent solenoid control circuit is shorted to system power (B+)
 
Vent solenoid power circuit is open
 
Vent solenoid is damaged or has failed
 
ECM has failed
 

Trouble Code: P0499



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



Output shaft rotor is chipped or damaged
 
Output shaft rotor is not aligned properly with the VSS unit
 
VSS tip contains debris or metal shavings (an intermittent fault)
 
VSS positive (+) signal circuit is open or shorted to ground
 
VSS negative (-) signal circuit is open or shorted to ground
 
VSS is damaged or has failed
 

Trouble Code: P0502



Vehicle Speed Sensor (VSS) Circuit Low Voltage

Possible Causes:



Ensure the VSS is correctly torqued to the transmission housing.
 

Trouble Code: P0503



Vehicle Speed Sensor (VSS) Circuit Intermittent

Possible Causes:



Ensure the VSS is correctly torqued to the transmission housing.
 

Trouble Code: P0506



Idle Speed Low

Trouble Code: P0507



Idle Speed High

Trouble Code: P0507



Idle Speed Too High

Possible Causes:



Air inlet duct is collapsed, loose or air filter element is clogged
 
A parasitic load on the engine
 
Base engine problem (i.e., compression or misfire condition)
 
MAF sensor is dirty, out-of-calibration or it is "skewed"
 
Throttle plate, throttle shaft or linkage is damaged or sticking
 
ECM has failed
 

Trouble Code: P0508



Cold Start Idle Air Control System Performance

Possible Causes:



Faulty Positive Crankcase Ventilation (PCV) system
 
Vacuum leaks
 
Mechanical conditions that limit engine speed
 
Restricted exhaust
 
Excessive deposits in the throttle body
 
Accessories that require additional torque to operate
 

Trouble Code: P050A



Cold Start Idle Air Control (IAC) System Performance

Possible Causes:



Air inlet duct is collapsed, loose or air filter element is clogged
 
A parasitic load on the engine
 
Base engine problem (i.e., compression or misfire condition)
 
MAF sensor is dirty, out-of-calibration or it is "skewed"
 
Throttle plate, throttle shaft or linkage is damaged or sticking
 
ECM has failed
 

Trouble Code: P0520



Engine Oil Pressure (EOP) Sensor Circuit

Trouble Code: P0532



Air Conditioning Pressure Sensor Circuit Low Voltage

Possible Causes:

Test the following conditions:



Visually inspect the sensor for contamination or damage.
 
Inspect for the following that may affect the sensors accuracy:

A malfunction within the refrigerant system causing high pressure
 
Visually inspect the A/C components and lines for damage.
 

Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0532



Air Conditioning A/C Refrigerant Pressure Sensor Circuit Low Voltage

Possible Causes:



A malfunction within the refrigerant system causing high pressure can cause this DTC to set.
 

Trouble Code: P0533



Air Conditioning Pressure Sensor Circuit High Voltage

Possible Causes:

Test the following conditions:



Visually inspect the sensor for contamination or damage.
 
Inspect for the following that may affect the sensors accuracy:

A malfunction within the refrigerant system causing high pressure
 
Visually inspect the A/C components and lines for damage.
 

Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0533



Air Conditioning A/C Refrigerant Pressure Sensor Circuit High Voltage

Possible Causes:



A malfunction within the refrigerant system causing high pressure can cause this DTC to set.
 

Trouble Code: P0562



System Voltage Low

Trouble Code: P0562



System Voltage Low

Possible Causes:

Inspect for the following conditions:



Loose or damaged terminals at the generator
 
Loose or worn generator drive belt
 
Inspect the connectors at the TCM, the transmission, and all other circuit connecting points for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
 
Inspect the circuit wiring for an intermittent condition. Refer to Testing for Electrical Intermittents .
 

Trouble Code: P0563



System Voltage High

Trouble Code: P0563



System Voltage High

Possible Causes:



Use the scan tool in order to inspect all other modules for voltage related DTCs.
 
Running the engine with a battery charger attached may cause DTC P0563 to set.

Inspect the charging circuit for high resistance.
 
Inspect the vehicle battery for open or sulfated cells.
 

 

Trouble Code: P0563



System Voltage High

Possible Causes:



A possible cause of this DTC could be overcharging with a battery charger or jump starting.
 
A high voltage value in multiple modules indicates a concern in the charging system.
 

Trouble Code: P0575



Cruise Control Switch Signal Circuit

Possible Causes:



This DTC may be stored as a history DTC without affecting the operation of the BCM. If stored only as a history DTC and not retrieved as a current DTC, do not replace the BCM.
 
If this DTC is retrieved as both a current and history DTC, replace the BCM.
 

 
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