Infinity_QX56_2004-2005

TroubleCodes (2 of 3)

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5.6L V8 - Auto



Trouble Code: P0444

EVAP Canister Purge Volume Control Solenoid Circuit Low Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage condition on the EVAP Canister Purge Volume Control Solenoid control circuit during the CCM test period.

Possible Causes:



Canister purge volume control solenoid connector is damaged
 
Canister purge volume control solenoid circuit is shorted
 
Canister purge volume control solenoid is damaged or failed
 
PCM is damaged or has failed
 

Trouble Code: P0445

EVAP Canister Purge Volume Control Solenoid Circuit High Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected high voltage condition on the EVAP Canister Purge Volume Control Solenoid control circuit during the CCM test period.

Possible Causes:



Canister purge volume control solenoid connector is damaged
 
Canister purge volume control solenoid circuit is open
 
Canister purge volume control solenoid is damaged or failed
 
PCM is damaged or has failed
 

Trouble Code: P0447

EVAP Canister Vent Control Solenoid Circuit Malfunction:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected voltage condition on the EVAP Canister Vent solenoid control circuit.

Possible Causes:



Canister vent control solenoid connector is damaged or loose
 
Canister vent control solenoid circuit is open (high voltage)
 
Canister vent control solenoid is damaged or failed
 
PCM is damaged or has failed
 

Trouble Code: P0451

EVAP System Pressure Sensor Range/Performance:

Trouble Code Conditions: Engine started, vehicle driven at cruise speed for 2-3 minutes, and the PCM detected an EVAP Pressure sensor signal that was not plausible when compared to various other sensor inputs.

Possible Causes:



EVAP pressure sensor circuit connector is damaged or loose
 
EVAP pressure sensor circuit open, shorted to ground or VREF
 
EVAP pressure sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0452

EVAP System Pressure Sensor Circuit Low Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage condition on the EVAP Pressure sensor signal circuit.

Possible Causes:



EVAP pressure sensor circuit connector is damaged (loose)
 
EVAP pressure sensor circuit is shorted to ground
 
EVAP pressure sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0453

EVAP System Pressure Sensor Circuit High Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected high voltage condition on the EVAP Pressure sensor signal circuit.

Possible Causes:



EVAP pressure sensor circuit connector is damaged (shorted)
 
EVAP pressure sensor circuit is open or shorted to VREF
 
EVAP pressure sensor is damaged or has failed
 
PCM is damaged
 

Trouble Code: P0455

EVAP System Gross Leak (0.080") Detected:

Trouble Code Conditions: DTC P1448 not set, vehicle driven at 53-60 mph for 6-8 minutes, ECT sensor signal from 32-158ºF, IAT sensor signal from 32-86ºF, fuel level from 25-75%, and the PCM detected a large leak (larger than 0.040") somewhere between the fuel tank and EVAP canister purge volume control solenoid during the EVAP Monitor leak test.

Possible Causes:



EVAP control system pressure sensor is damaged or has failed
 
EVAP purge solenoid or canister vacuum line loose or off
 
EVAP purge solenoid is damaged or has failed
 
EVAP emission canister is dirty, restricted or full of water
 
EVAP canister vent control valve is damaged or has failed
 
Fuel tank cap loose, missing or it is the wrong part number
 
Fuel tank temperature sensor is damaged or has failed
 
Fuel tank vacuum relief valve is damaged or has failed
 
Large leak in the EVAP canister or in the fuel tank area
 
ORVR system is damaged or has a large leak in a component
 
Refueling control valve is damaged or has failed
 
Vacuum hose leaking between intake manifold and Purge valve
 
TSB 00-046 (7/00) contains information related to this code
 

Trouble Code: P0456

EVAP System Very Small Leak (0.020") Detected:

Trouble Code Conditions: IAT sensor signal from 32-86ºF, ECT sensor signal from 32-158ºF, fuel level from 25-75%, engine started, vehicle driven with the EVAP purge and vent solenoids both enabled, and the PCM detected the presence of a very small leak in the EVAP system in the leak test.

Possible Causes:



EVAP control system pressure sensor is damaged or has failed
 
EVAP purge solenoid is damaged or has failed
 
EVAP canister vent control valve is damaged or has failed
 
Fuel tank cap not tightened properly or the wrong part number
 
Fuel tank temperature sensor is damaged or has failed
 
Fuel tank vacuum relief valve is damaged or has failed
 
Very small leak in the EVAP canister or in the fuel tank area
 
ORVR system is damaged or has a small leak in a component
 
Refueling control valve is damaged or has failed
 
TSB 00-046 (7/00) contains information related to this code
 

Trouble Code: P0461

Fuel Level Sensor Range/Performance:

Trouble Code Conditions: Engine started, vehicle driven a distance of more than 30 miles, the PCM did not detect any change in the Fuel Level sensor input (i.e., there was no change after driving the vehicle for several miles).

Possible Causes:



Fuel level sensor signal open or shorted to ground
 
Fuel level sensor is damaged (stuck) or has failed
 
PCM has failed
 

Trouble Code: P0462

Fuel Level Sensor Circuit Low Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage condition on the Fuel Level sensor circuit during testing. The fuel level sensor is mounted in the fuel level sensor unit in the fuel tank. This sensor sends a signal to the PCM indicating the fuel level.

Possible Causes:



Fuel level sensor connector is damaged or loose (intermittent)
 
Fuel level sensor signal is shorted to ground
 
Fuel level sensor is damaged (stuck) or has failed
 

Trouble Code: P0463

Fuel Level Sensor Circuit High Input:

Trouble Code Conditions: Key on or engine running; and PCM detected an unexpected high voltage condition on the Fuel Level sensor input during testing. The fuel level sensor is mounted in the fuel level sensor unit in the fuel tank. This sensor sends a signal to the PCM indicating the fuel level.

Possible Causes:



Fuel level sensor connector is damaged or loose (intermittent)
 
Fuel level sensor signal shorted to ground
 
Fuel level sensor is damaged or has failed
 

Trouble Code: P0500

Vehicle Speed Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started, vehicle driven at over 1500 rpm at light engine load for over 1 minute, and the PCM did not detect any VSS signals.

Possible Causes:



ABS/TCS control unit is damaged or has failed
 
Combination meter is damaged or has failed
 
VSS signal circuit is open, shorted to ground or shorted to B+
 
VSS is damaged or has failed
 
PCM has failed
 

Trouble Code: P0506

Idle Speed Control System RPM Lower 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 lower than the desired (control) idle speed.

Possible Causes:



Air inlet duct is collapsed, loose or air filter element is clogged
 
Base engine problem (i.e., a compression or misfire problem)
 
Idle air inlet passage or throttle bore is dirty or full of deposits
 
Electronic throttle control actuator connector is open
 
Electronic throttle control actuator circuit is open
 
Electronic throttle control actuator is damaged or has failed
 

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: 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: 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: 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: 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: 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: 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
 

 
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