Infinity_FX35_FX45_2003-2005

TroubleCodes (8 of 9)

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4.5L V8 - Auto



Trouble Code: P0507

Idle Speed Control System RPM Higher Than Expected:

Trouble Code Conditions: Engine started, engine running at hot idle speed for 30 seconds, and the PCM detected the Idle Speed Control system engine speed was more than 100 rpm higher than the desired (control) idle speed.

Possible Causes:



Engine vacuum leaks, PCM valve is leaking or the wrong valve
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
Electronic throttle control actuator connector is shorted
 
Electronic throttle control actuator circuit is shorted
 
Electronic throttle control actuator is damaged or has failed
 

Trouble Code: P0550

Power Steering Pressure Switch Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low or high voltage on the Power Steering Pressure switch circuit.

Possible Causes:



PSPS connector is damaged or loose (intermittent fault)
 
PSPS signal circuit is open or shorted to ground
 
PSPS assembly is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P0605

PCM Internal Fault Detected:

Trouble Code Conditions: Engine runtime over 30 seconds, and the PCM detected an internal calculation function problem or a problem in the self-shutoff function.

Possible Causes:



Clear the codes and retest for DTC P0605. If the same code resets, substitute a known good PCM and retest. If the code does not reset, the original PCM has failed.
 

Trouble Code: P0650

Malfunction Indicator Lamp Circuit Malfunction:

Trouble Code Conditions: Engine started, and the PCM detected an unexpected high voltage condition on the MIL control circuit with the MIL activated, or it detected a low voltage on the MIL circuit with the MIL not activated.

Possible Causes:



MIL control circuit is open (high voltage condition)
 
MIL control circuit is shorted to ground (high voltage condition)
 
PCM is damaged or has failed.
 

Trouble Code: P0705

Park Neutral Position Switch Circuit Malfunction:

Trouble Code Conditions: Engine started, and the PCM detected multiple P/N switch inputs, or it did not a change in the P/N switch inputs with the vehicle moving.

Possible Causes:



P/N switch connector is damaged or loose
 
P/N switch signal circuit is open or shorted to ground
 
P/N switch signal circuit is shorted to VREF or system power
 
P/N switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P0710

Transmission Fluid Temperature Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a speed over 6 mph in Drive with the TP signal over 1.20v, and the PCM detected the TFT sensor signal from the TCM was either too high or low during the CCM test.

Possible Causes:



TFT sensor signal circuit is open or shorted to ground
 
TFT sensor signal circuit is shorted to VREF or system power
 
TFT sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0720

TCM Revolution Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a speed of 19-35 mph in Drive with the TP signal over 1.20v for 30 seconds, and the TCM did not detect any signals from the Revolution sensor during the CCM test.

Possible Causes:



Revolution sensor connector is damage, open or shorted
 
Revolution sensor signal circuit is open or shorted to ground
 
Revolution sensor signal circuit shorted to VREF or power (B+)
 
Revolution sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0725

TCM Engine Speed Signal Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at 19-35 mph in Drive with the TP signal over 1.20v for 30 seconds, and the TCM did not detect any Engine Speed signals during the CCM continuous test.

Possible Causes:



Engine speed signal is open or shorted to ground
 
Engine speed sensor signal shorted to VREF or power (B+)
 
Engine speed sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0731

A/T First Gear Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an incorrect voltage condition on the 1st Gear circuit. Note: During this test, the CCM monitors the Actual gear position by checking the torque converter slip ratio. The slip ratio is calculated as this equation: A X C/B (where 'A' is the output shaft revolution signal, 'B' is the engine speed signal from the PCM, and 'C' is the gear ratio inferred TCM from other inputs. If the Actual gear ratio is higher than the gear position (1st2nd) inferred by the TCM, the slip ratio will be too high. If the slip ratio exceeds a certain value, the TCM determines that a fault exists and signals the PCM.

Possible Causes:



Shift Solenoid 'A' is stuck in open position
 
Shift Solenoid 'B' is stuck in open position
 

Trouble Code: P0732

A/T Second Gear Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an incorrect voltage condition on the 2nd Gear circuit. Note: During this test, the CCM monitors the Actual gear position by checking the torque converter slip ratio. The slip ratio is calculated as this equation: A X C/B (where 'A' is the output shaft revolution signal, 'B' is the engine speed signal from the PCM, and 'C' is the gear ratio inferred TCM from other inputs. If the Actual gear ratio is higher than the gear position (2nd) inferred by the TCM, the slip ratio will be too high. If the slip ratio exceeds a certain value, the TCM determines that a fault exists and signals the PCM to set this code.

Possible Causes:



Control valve sticking or binding
 
Solenoid valve is damaged or not operating
 

Trouble Code: P0733

A/T Third Gear Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an incorrect voltage condition on the 3rd Gear circuit. Note: During this test, the CCM monitors the Actual gear position by checking the torque converter slip ratio. The slip ratio is calculated as this equation: A X C/B (where 'A' is the output shaft revolution signal, 'B' is the engine speed signal from the PCM, and 'C' is the gear ratio inferred TCM from other inputs. If the Actual gear ratio is higher than the gear position (3rd) inferred by the TCM, the slip ratio will be too high. If the slip ratio exceeds a certain value, the TCM determines that a fault exists and signals the PCM.

Possible Causes:



Control valve sticking, solenoid valve damaged or not operating
 
Servo piston or brake band is damaged or is not operating
 

Trouble Code: P0734

A/T Fourth Gear Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an incorrect voltage condition on the 4th Gear circuit. Note: During this test, the CCM monitors the Actual gear position by checking the torque converter slip ratio. The slip ratio is calculated as this equation: A X C/B (where 'A' is the output shaft revolution signal, 'B' is the engine speed signal from the PCM, and 'C' is the gear ratio inferred TCM from other inputs. If the Actual gear ratio is higher than the gear position (4th) inferred by the TCM, the slip ratio will be too high. If the slip ratio exceeds a certain value, the TCM determines that a fault exists and signals the PCM.

Possible Causes:



Oil pump is damaged, or the TCC is not operating
 
Shift Solenoid 'B' may be stuck closed
 

Trouble Code: P0740

A/T TCC Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an unexpected voltage condition on the TCC solenoid control circuit during the CCM continuous test.

Possible Causes:



TCC solenoid connector is damaged, open or shorted
 
TCC solenoid control circuit open or shorted to ground
 
TCC solenoid control circuit shorted to system power (B+)
 
TCC solenoid is damaged or has failed
 

Trouble Code: P0744

A/T Servo Valve Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an unexpected voltage condition on the Servo Valve solenoid control circuit during the CCM continuous test.

Possible Causes:



Servo valve solenoid connector is damaged, open or shorted
 
Servo valve solenoid control circuit open or shorted to ground
 
Servo valve solenoid control circuit shorted to system power
 
Servo valve solenoid is damaged or has failed
 
TSB 03-034 (5/03) contains information related to this code
 

Trouble Code: P0745

A/T Low Pressure Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an unexpected voltage condition on the Low Pressure solenoid control circuit during the CCM test.

Possible Causes:



Low pressure solenoid connector is damaged, open or shorted
 
Low pressure solenoid control circuit open or shorted to ground
 
Low pressure solenoid control circuit shorted to system power
 
Low pressure solenoid is damaged or has failed
 
TSB 03-034 (5/03) contains information related to this code
 

Trouble Code: P0750

A/T Shift Solenoid 'A' Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an unexpected voltage condition on the Shift Solenoid 'A' control circuit during the CCM test.

Possible Causes:



Shift Solenoid -A- connector is damaged, open or shorted
 
Shift Solenoid 'A' control circuit open or shorted to ground
 
Shift Solenoid 'A' control circuit shorted to VREF or power (B+)
 
Shift Solenoid 'A' is damaged or has failed
 
PCM or TCM has failed
 

Trouble Code: P0755

A/T Shift Solenoid 'B' Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at a steady cruise speed, and the TCM detected an unexpected voltage condition on the Shift Solenoid 'B' control circuit during the CCM test.

Possible Causes:



Shift Solenoid -B- connector is damaged, open or shorted
 
Shift Solenoid 'B' control circuit open or shorted to ground
 
Shift Solenoid 'B' control circuit shorted to VREF or power (B+)
 
Shift Solenoid 'B' is damaged or has failed
 
PCM or TCM has failed
 

Trouble Code: P1105

MAP/BARO Switch Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine started, then after the PCM cycled the MAP/BARO Switch Solenoid (to change the MAP input signal to read the atmospheric pressure instead of manifold pressure), the PCM detected the MAP sensor input did not change to reflect the atmospheric pressure.

Possible Causes:



Absolute pressure sensor is damaged or out of calibration
 
MAP/BARO switch solenoid control circuit is open or grounded
 
MAP/BARO switch solenoid control circuit is shorted to power
 
MAP/BARO switch solenoid is damaged or has failed
 
MAP/BARO switch solenoid vacuum hoses loose or restricted
 
PCM has failed
 

Trouble Code: P1110

Intake Valve Timing Control System Performance:

Trouble Code Conditions: Engine started, ECT sensor input at 59-230ºF, vehicle driven to over 4 mph at an engine speed of 1100-4600 rpm at high load conditions, the PCM detected the difference between the Intake Valve Timing solenoid "on" position did not correlate to the position wit it "off".

Possible Causes:



Intake valve timing position control sensor circuit is open
 
Intake valve timing position control solenoid damaged or failed
 
Signal pickup portion of camshaft is contaminated with debris
 

Trouble Code: P1120

Secondary Throttle Position Sensor Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an out of range high or low signal from the Secondary Throttle Position sensor, or with the engine running, it detected a signal that was not practical when compared to the IACV-AAC valve, CMP and MAP sensors.

Possible Causes:



Secondary throttle position sensor circuit is open or shorted
 
Secondary throttle position sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P1125

Tandem Throttle Position Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, engine runtime over 15 seconds, and the PCM detected the Tandem Throttle Position sensor signal was not practical when compared to signals from the IACV-AAC, CMP and MAF sensors.

Possible Causes:



Secondary throttle position sensor is damaged or has failed
 
Tandem throttle position sensor circuit is open or shorted
 
Tandem throttle position sensor is damaged or has failed
 
Throttle actuator control (TAC) module has failed
 

Trouble Code: P1135

Intake Valve Timing Control Circuit Malfunction (Bank 2):

Trouble Code Conditions: Engine started, and the PCM detected an unexpected voltage condition in the Intake Valve Timing Control solenoid circuit for Cylinder Bank 2 during the CCM test.

Possible Causes:



Intake valve timing control solenoid circuit is open
 
Intake valve timing position control solenoid is damaged/failed
 
PCM has failed
 

Trouble Code: P1140

Intake Valve Timing Control Position Sensor Circuit Malfunction (Bank 1):

Trouble Code Conditions: Engine started, and the PCM detected an unexpected voltage on the Bank 1 Intake Valve Timing Control Position sensor circuit.

Possible Causes:



Intake valve timing control position sensor open or shorted
 
Intake valve timing control position sensor is damaged
 
Intake valve timing control position sensor has failed
 
PCM has failed
 

Trouble Code: P1145

Intake Valve Timing Control Position Sensor Circuit Malfunction (Bank 2):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected an unexpected voltage on the Bank 2 Intake Valve Timing Control Position sensor circuit during the CCM test.

Possible Causes:



Intake valve timing control position sensor open or shorted
 
Intake valve timing control position sensor is damaged
 
Intake valve timing control position sensor has failed
 
PCM has failed
 

Trouble Code: P1148

Closed Loop Malfunction Detected (Bank 1):

Trouble Code Conditions: Engine started, engine running in closed loop for over 2 minutes, and the PCM determined the engine was not operating in closed loop mode after the additional driving period had elapsed.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S is damaged, contaminated or has failed
 
HO2S heater is damaged or has failed
 

Trouble Code: P1168

Closed Loop Malfunction Detected (Bank 2):

Trouble Code Conditions: Engine started, engine running in closed loop for over 2 minutes, and the PCM determined the engine was not operating in closed loop mode after the additional driving period had elapsed.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S is damaged, contaminated or has failed
 
HO2S heater is damaged or has failed
 

Trouble Code: P1220

Fuel Pump Control Module Circuit Malfunction:

Trouble Code Conditions: Engine runtime over 16 seconds, and the PCM detected an incorrect signal from the Fuel Pump Control Module during the CCM test.

Possible Causes:



FPCM signal circuit to the PCM open or shorted to ground
 
FPCM signal circuit to the PCM shorted to system power (B+)
 
FPCM signal circuit dropping resistor is damaged or has failed
 
FPCM is damaged or has failed
 

Trouble Code: P1335

Crankshaft Position Reference Sensor Circuit Malfunction:

Trouble Code Conditions: Engine cranking; and the PCM did not receive the CKP sensor 120º reference signals, or with the engine running, it did not detect any 120º reference signals, or it detected the signals changed too much.

Possible Causes:



CKP sensor connector is damaged, loose or shorted
 
CKP reference signal circuit is open or shorted to ground
 
CKP reference sensor is damaged or has failed
 
Starter motor or starter motor circuit is damaged (not working)
 

Trouble Code: P1400

EGR Control Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine started, engine running at cruise speed under light engine load, and the PCM detected an improper voltage signal from the EGR Control solenoid while the solenoid was being operated.

Possible Causes:



EGRC solenoid connector is damaged, open or shorted
 
EGRC solenoid control circuit is open or shorted to ground
 
EGRC solenoid control circuit is shorted to system power (B+)
 
EGRC solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1401

EGR Temperature Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, engine running at light load in closed loop at over 5 mph, and the PCM detected the EGR Temperature sensor input was too low or too high when compared to the ECT sensor input.

Possible Causes:



EGR temperature sensor connector is damaged or shorted
 
EGR temperature sensor signal circuit open/shorted to ground
 
EGR temperature sensor signal circuit shorted to VREF
 
EGR temperature sensor is damaged or has failed
 

Trouble Code: P1402

EGR System Malfunction (Open) Detected:

Trouble Code Conditions: Engine started, engine running at over 5 mph at light engine conditions, and the PCM detected excessive EGR gas flow.

Possible Causes:



EGR valve seat leaking or EGR valve stuck in open position
 
EGRC solenoid is damaged or has failed
 
EGR temperature sensor is damaged or has failed
 
EGRC-BPT valve is damaged or has failed
 

Trouble Code: P1444

Canister Purge Volume Control Valve Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed at light engine load, and the PCM detected purge flow through the canister with the Purge Volume Control valve commanded closed during the test.

Possible Causes:



EVAP control system pressure sensor is damaged or has failed
 
EVAP purge volume control valve is stuck open
 
EVAP canister vent control valve is damaged or has failed
 
EVAP canister is damaged, or hoses are connected incorrectly
 

Trouble Code: P1446

EVAP Canister Vent Valve Closed Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed for 1-2 minutes, and the PCM detected the EVAP Canister Vent Valve remained closed.

Possible Causes:



EVAP canister vent control valve is damaged or has failed
 
EVAP canister vent control valve rubber tube is blocked
 
EVAP control system pressure sensor is damaged or has failed
 
EVAP water separator is damaged or has failed
 
EVAP canister is saturated with water
 

Trouble Code: P1447

EVAP Control System Purge Flow Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at cruise for 1 minute, and the PCM detected a leak between the intake manifold and the EVAP pressure sensor, or that the EVAP control system did not purge properly.

Possible Causes:



EVAP canister purge volume control valve stuck closed
 
EVAP canister purge control valve stuck closed
 
EVAP control pressure sensor is damaged or has failed
 
EVAP canister vent control valve is damaged or has failed
 
EVAP rubber tube is blocked, disconnected or bent
 
EVAP canister purge control solenoid is damaged or has failed
 
MAP/BARO switch solenoid vacuum line is blocked or bent
 
EVAP canister is leaking (it may be cracked)
 
EVAP 1-way valve connected improperly or purge port blocked
 

Trouble Code: P1448

EVAP Canister Vent Control Valve Malfunction (Open):

Trouble Code Conditions: DTC P0442 not set, engine started, vehicle driven at cruise speed at light engine load, and the PCM detected the EVAP Canister Vent Control Valve remained open after the PCM commanded it closed.

Possible Causes:



EVAP canister vent control valve is damaged or has failed
 
EVAP control pressure sensor is damaged or has failed
 
EVAP canister vent control valve rubber tube is blocked
 
EVAP water separator has failed or canister is full of water
 
EVAP vacuum cut valve is damaged or has failed
 
TSB 00-046 (7/00) contains information related to this code
 

Trouble Code: P1464

Fuel Level Sensor Ground Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected high voltage signal on the Fuel Level sensor ground circuit during the CCM test. This circuit normally reads near 0.00v with the key on.

Possible Causes:



Fuel level sensor signal circuit is open or grounded
 
Fuel level sensor circuit is shorted to VREF
 
Fuel level sensor is damaged or has failed
 

Trouble Code: P1490

EVAP Vacuum Cut Valve Bypass Valve Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage condition on the EVAP Vacuum Cut Valve Bypass Valve circuit during the CCM test.

Possible Causes:



EVAP vacuum cut valve bypass valve connector is damaged
 
EVAP vacuum cut valve bypass valve control circuit is open
 
EVAP vacuum cut valve bypass valve control circuit is shorted
 
EVAP vacuum cut valve bypass valve is damaged or has failed
 
PCM is damaged
 

Trouble Code: P1491

EVAP Vacuum Cut Valve/Bypass Range/Performance:

Trouble Code Conditions: Engine started, ECT sensor signal from 41-86ºF, engine at idle speed or 70 seconds, and the PCM detected the Vacuum Vent Cut Valve/Bypass Valve did not operate properly during the CCM test.

Possible Causes:



EVAP vacuum cut bypass valve is damaged or has failed
 
EVAP vacuum cut valve is damaged or has failed
 
EVAP control system pressure sensor damaged or has failed
 
Vapor hose between fuel tank and cut valve is blocked or bent
 
Vapor hose between canister and vacuum cut valve is plugged
 
EVAP canister is damaged or EVAP purge port at tank is dirty
 
TSB 02-015 (3/02) contains information that relates to this code
 

Trouble Code: P1492

EVAP Canister Purge Control Solenoid Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage on the Canister Purge Control Valve/Solenoid Valve circuit.

Possible Causes:



EVAP canister purge control solenoid control circuit is open
 
EVAP canister purge control solenoid control circuit is shorted
 
EVAP canister purge control solenoid is damaged or has failed
 
PCM has failed
 

Trouble Code: P1493

EVAP Canister Purge Control Solenoid Performance (Stuck Open):

Trouble Code Conditions: Engine running in closed loop under light engine load conditions, and the PCM detected that the EVAP Canister Purge Control Valve did not operate correctly (it may be stuck in open position).

Possible Causes:



EVAP canister purge control valve is damaged or has failed
 
EVAP canister purge control solenoid valve is damaged/failed
 
EVAP vacuum hoses are clogged or disconnected
 
EVAP canister vent control valve is damaged or has failed
 
EVAP canister is full of water, or the vapor separator has failed
 

 
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