Infinity_FX35_FX45_2003-2005

TroubleCodes (4 of 9)

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3.5L V6 - Auto



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: P1102

Mass Airflow Sensor Range/Performance:

Trouble Code Conditions: Engine started, engine running at idle and cruise, and the PCM detected the MAF sensor signal remained near 1.0v at all times.

Possible Causes:



MAF sensor connector is damaged (it may be shorted)
 
MAF sensor signal circuit is shorted
 
MAF sensor is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P1111

Intake Valve Timing Control Circuit Malfunction (Bank 1):

Trouble Code Conditions: Engine started, and the PCM detected an unexpected voltage condition in the Intake Valve Timing Control solenoid circuit for Cylinder Bank 1 during the CCM test.

Possible Causes:



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

Trouble Code: P1121

Electronic Throttle Control Actuator Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected a problem in the operation of the Electronic Throttle Control Actuator operation (two-trip failure detection), or that the throttle was stuck "open" due to a return spring mechanical problem (one-trip failure detection).

Possible Causes:



Electronic throttle control actuator is damaged or has failed
 
Throttle return spring is damaged or has failed
 

Trouble Code: P1122

Electronic Throttle Control Actuator Malfunction:

Trouble Code Conditions: DTC P1121 and P1126 not set; key on or engine running; and the PCM detected a problem in the operation of the Electronic Throttle Control Actuator operation during the CCM test period.

Possible Causes:



Electronic throttle control actuator connector is damaged/loose
 
Electronic throttle control actuator circuit is open or shorted
 
Electronic throttle control actuator is damaged or has failed
 

Trouble Code: P1124

Electronic Throttle Control Actuator Relay High Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected high voltage on the Electronic Throttle Control Actuator Relay power circuit after the key was turned "off" during the CCM shutdown test.

Possible Causes:



ETC Actuator relay is damaged or failed (stuck in "on" position)
 
ETC Actuator relay control circuit is shorted to ground
 
ETC Actuator is damaged or has failed
 

Trouble Code: P1126

Electronic Throttle Control Actuator Relay Low Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage on the Electronic Throttle Control Actuator Relay power circuit during the CCM test period.

Possible Causes:



ETC Actuator relay is damaged or failed (stuck in "off" position)
 
ETC Actuator relay control circuit is open
 
ETC Actuator is damaged or has failed
 

Trouble Code: P1128

Electronic Throttle Control Actuator Motor Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage condition both of the Electronic Throttle Control Actuator motor circuits during the CCM test period.

Possible Causes:



ETC Actuator motor is damaged or has failed
 
ETC Actuator motor circuits are shorted to ground (low voltage)
 

Trouble Code: P1136

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. The Intake Valve Timing Control Solenoid Valve is controlled by a duty cycle signal from the PCM. This valve changes the amount of oil (and direction of the oil flow) through the Intake Valve Timing Control unit, or stops the flow.

Possible Causes:



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

Trouble Code: P1143

HO2S-11 (Bank 1 Sensor 1) Lean Shift Monitoring (Bank 1):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S signal circuit were not reached during the CCM test period.

Possible Causes:



Air leaks in the intake manifold, throttle body or PCV system
 
Fuel pressure is excessively low (lean air fuel)
 
Fuel injectors restricted (one or more has a mechanical fault)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly is damaged or has failed
 

Trouble Code: P1146

HO2S-12 (Bank 1 Sensor 2) Lean Shift Monitoring (Bank 1):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S-12 signal circuit were not reached during the CCM test period.

Possible Causes:



Air leaks in the intake manifold, throttle body or PCV system
 
Fuel pressure is excessively low (lean air fuel)
 
Fuel injectors restricted (one or more has a mechanical fault)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly is damaged or has failed
 

Trouble Code: P1147

HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 1):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S-12 signal circuit were not reached during the CCM test period.

Possible Causes:



Fuel pressure is excessively high (rich air fuel)
 
Fuel injectors sticking open (one or more has a mechanical fault)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly is damaged or 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: P1163

HO2S-12 (Bank 1 Sensor 2) Lean Shift Monitoring (Bank 2):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S-12 signal circuit were not reached during the CCM test period.

Possible Causes:



Air leaks in the intake manifold, throttle body or PCV system
 
Fuel pressure is excessively low (lean air fuel)
 
Fuel injectors restricted (one or more has a mechanical fault)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly is damaged or has failed
 

Trouble Code: P1164

HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 2):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S-12 signal circuit were not reached during the CCM test period.

Possible Causes:



Fuel pressure is excessively high (rich air fuel)
 
Fuel injectors sticking open (one or more mechanical faults)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly is damaged or has failed
 

Trouble Code: P1166

HO2S-22 (Bank 2 Sensor 2) Lean Shift Monitoring (Bank 2):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S-22 signal circuit were not reached during the CCM test period.

Possible Causes:



Air leaks in the intake manifold, throttle body or PCV system
 
Fuel pressure is excessively low (lean air fuel)
 
Fuel injectors restricted (one or more has a mechanical fault)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly is damaged or has failed
 

Trouble Code: P1167

HO2S-22 (Bank 2 Sensor 2) Rich Shift Monitoring (Bank 2):

Trouble Code Conditions: Engine started, vehicle driven at over 48 mph for 2 minutes, and the PCM detected the minimum and maximum voltages of the HO2S-22 signal circuit were not reached during the CCM test period.

Possible Causes:



Fuel pressure is excessively high (rich air fuel)
 
Fuel injectors sticking open (one or more with mechanical fault)
 
HO2S assembly is damaged or has failed
 
HO2S heater assembly 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: P1211

VDC/TCS/ABS Control Unit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected signal from the VDC/TCSABS control unit, or it detected the Traction Control System fuel-cut operation continued for too long of a time.

Possible Causes:



Traction Control System (TCS) related parts have failed
 
VDCTCS/ABS controller is damaged or has failed
 

Trouble Code: P1212

VDC/TCS/ABS Communication Line Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected a continuous incorrect signal (digital pulse signal) from the VDC/TCS/ABS unit.

Possible Causes:



VDCTCS/ABS communication line is open or shorted to ground
 
VDCTCS/ABS controller has failed
 
System voltage is too low (a severely discharged battery)
 

Trouble Code: P1217

Engine Over-Temperature Condition:

Trouble Code Conditions: Engine running in closed loop, and the PCM detected an engine overheated (engine over temperature) condition for too long a time.

Possible Causes:



Check cooling system components (i.e., hoses, cap, coolant)
 
Check the thermostat operation (it may be stuck partly closed)
 
Engine cooling fan circuit(s) open or shorted to ground
 
Engine cooling fan is damaged or has failed
 

Trouble Code: P1225

Closed Throttle Learning Position Range/Performance:

Trouble Code Conditions: Engine started, system voltage over 10.0v, and the PCM detected the Closed Throttle Learning Position voltage was excessively low in the test. The ETC Actuator consists of the ETC motor, TP1 and TP2 sensors. These sensors send a throttle position signal to the PCM.

Possible Causes:



Electronic Throttle Control Actuator is damaged or has failed (i.e., the TP1 and TP2 sensor assemblies in the ETCA failed).
 

Trouble Code: P1226

Closed Throttle Learning Position Range/Performance:

Trouble Code Conditions: Key on or engine running; system voltage over 10.0v, and the PCM determined that the Closed Throttle Learning Position step was not performed properly several times during the CCM test period.

Possible Causes:



Electronic Throttle Control Actuator is damaged or has failed (i.e., the TP1 and TP2 sensor assemblies in the ETCA failed).
 

Trouble Code: P1229

Accelerator Pedal Position Sensor 2 Power Circuit Short:

Trouble Code Conditions: Engine started, system voltage over 10.0v, and the PCM detected an unexpected high or low voltage condition on the Accelerator Pedal Position (APP) Sensor 2 power source (VREF) circuit. The APP2 sensor is installed on the upper end of the throttle unit. The sensor detects the accelerator position and sends it to the PCM.

Possible Causes:



AAP1 and/or APP2 sensor circuits are shorted to ground
 
APP2 sensor connector is damaged (shorted to ground)
 
ETC Actuator assembly is internally shorted to power or ground
 
TP1 and TP2 sensor circuits are shorted together or to ground
 
PCM terminal to the VREF power circuit is open
 
VREF power circuit to the APP1, APP2, MAF, EVAP pressure sensor, PSPS or refrigerant pressure sensor shorted to ground
 

Trouble Code: P1336

Crankshaft Position Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, engine runtime more than 5 seconds, and the PCM detected that the crankshaft position (CKP POS) signals were erratic or missing during the CCM continuous test.

Possible Causes:



CKP sensor connector is damaged, loose or shorted
 
CKP POS signal circuit is open or shorted to ground
 
Crankshaft position (POS) sensor is damaged or has failed
 
Engine flywheel or drive plate gear tooth may be chipped or damaged (causing erratic CKP signals - check with Lab Scope)
 

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
 

 
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