Infinity_QX56_2004-2005

TroubleCodes (1 of 3)

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5.6L V8 - Auto



5.6L V8 - Auto

Trouble Code: P0122

Throttle Position Sensor 2 Circuit Low Input

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage condition on the TP sensor 2 signal during the CCM test. The ETC Actuator consists of a throttle control motor and TP sensors. The TP sensors respond to movement of the throttle valve. The PCM judges the actual opening angle of the throttle valve from the signals from the TP1 and TP2 sensors during engine operation.

Possible Causes:



TP sensor 2 connector is damaged or loose (intermittent fault)
 
TP sensor 2 signal circuit is shorted to ground
 
TP sensor 2 is damaged, or the ETC Actuator has failed
 

Trouble Code: P0123

Throttle Position Sensor 2 Circuit High Input:

Trouble Code Conditions: DTC P0510 not set, engine started, system voltage over 10.0v, and the PCM detected an unexpected high voltage condition on the TP sensor signal during the CCM test.

Possible Causes:



TP sensor 2 connector is damaged or loose (intermittent fault)
 
TP sensor 2 signal circuit is open or shorted to VREF
 
TP sensor 2 is damaged, or the ETC Actuator has failed
 

Trouble Code: P0125

ECT Sensor Excessive Time To Enter Closed Loop:

Trouble Code Conditions: DTC P0115 not set, engine started, engine runtime over 6 minutes, ECT sensor more than 176ºF, and the PCM detected that the engine did not achieve closed loop operation during the test period. Note: If DTC P0125 is set with DTC P0115, repair DTC P0115 first!

Possible Causes:



Check the operation of the thermostat (it may be stuck open)
 
ECT sensor signal circuit has a high resistance condition
 
ECT sensor is damaged or has failed (out of calibration)
 

Trouble Code: P0133

HO2S-11 (Bank 1 Sensor 1) Slow Response:

Trouble Code Conditions: Engine started, vehicle driven in Drive to over 50 mph at 1200-3100 rpm, IAT sensor signal from 14-122ºF, Fuel Schedule from 2.5-12.0 ms, and the PCM detected the average HO2S-11 response time indicated more than 1 second.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S element is contaminated, or HO2S heater has failed
 
Intake air leaks, exhaust manifold leaks or PCV system leaks
 
MAF sensor out of calibration (it may be dirty or contaminated)
 

Trouble Code: P0137

HO2S-12 (Bank 1 Sensor 2) Circuit Low Input (Lean Shift):

Trouble Code Conditions: Engine running in closed loop at a speed of over 20 mph for at least 20 seconds, IAT sensor signal from 14-122ºF, fuel level over 25%, and the PCM detected the HO2S signal did not reach a maximum voltage level of 0.60v, or it remained fixed at approximately 300 mv.

Possible Causes:



Low fuel pressure, fuel filter restricted or fuel injectors plugged
 
HO2S may be contaminated or it has failed
 
HO2S heater is damaged or has failed
 

Trouble Code: P0138

HO2S-12 (Bank 1 Sensor 2) Circuit High Input (Rich Shift):

Trouble Code Conditions: Engine started, IAT sensor signal from 14-122ºF, fuel level over 25%, vehicle driven at over 20 mph for 2-3 minutes, and the PCM detected the HO2S-12 input did not reach a maximum voltage level of 0.60v, or the signal remained fixed at approximately 300 mv.

Possible Causes:



Fuel pressure regulator leaking or fuel injectors leaking
 
HO2S connector is damaged or loose (an open circuit)
 
HO2S signal circuit is open or shorted to power
 
HO2S assembly is contaminated or it has failed
 

Trouble Code: P0139

HO2S-12 (Bank 1 Sensor 2) Slow Response

Trouble Code Conditions: Engine started, IAT sensor input from 14-122ºF, fuel level over 25%, vehicle driven at over 20 mph for 20 seconds, and the PCM detected the average HO2S-12 response time indicated more than 1 second.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S element is contaminated, or HO2S heater has failed
 
Intake air leaks, exhaust manifold leaks or PCV system leaks
 
MAF sensor out of calibration (it may be dirty or contaminated)
 

Trouble Code: P0152

HO2S-21 (Bank 2 Sensor 1) Circuit High Input (Rich Shift):

Trouble Code Conditions: Engine started, IAT sensor input from 14-122ºF, fuel level over 25%, vehicle driven at over 20 mph while in closed loop, and the PCM detected the minimum HO2S-21signal indicated more than 600 mv.

Possible Causes:



Fuel pressure regulator leaking or fuel injectors leaking
 
HO2S connector is damaged or loose (an open circuit)
 
HO2S signal circuit is open or shorted to power
 
HO2S is contaminated or it has failed
 

Trouble Code: P0153

HO2S-21 (Bank 2 Sensor 1) Slow Response:

Trouble Code Conditions: Engine started, IAT sensor input from 14-122ºF, fuel level over 25%, vehicle driven at over 20 mph while in closed loop, and the PCM detected the average HO2S response time was more than 1 second.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S element is contaminated, or HO2S heater has failed
 
Intake air leaks, exhaust manifold leaks or PCV system leaks
 
MAF sensor out of calibration (it may be dirty or contaminated)
 

Trouble Code: P0158

HO2S-22 (Bank 2 Sensor 2) Circuit High Input (Rich Shift):

Trouble Code Conditions: Engine started, IAT sensor input from 14-122ºF, fuel level over 25%, vehicle driven at over 20 mph while in closed loop, and the PCM detected the HO2S-22 input did not reach a maximum voltage level of 0.60v, or it remained fixed at approximately 300 mv.

Possible Causes:



Low fuel pressure, fuel filter restricted or fuel injectors plugged
 
HO2S may be contaminated or it has failed
 
HO2S heater is damaged or has failed
 
TSB 02-008 (5/02) contains information related to this code
 

Trouble Code: P0159

HO2S-22 (Bank 2 Sensor 2) Slow Response:

Trouble Code Conditions: Engine started, IAT sensor input from 14-122ºF, fuel level over 25%, vehicle driven at over 20 mph while in closed loop, and the PCM detected the average HO2S response time was more than 1 second.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S element is contaminated, or HO2S heater has failed
 
Intake air leaks, exhaust manifold leaks or PCV system leaks
 
MAF sensor out of calibration (it may be dirty or contaminated)
 

Trouble Code: P0171

Fuel Trim Lean (Bank 1):

Trouble Code Conditions: Engine started, engine running at cruise speed in closed loop, and the PCM detected the Bank 1 fuel system indicated a lean condition.

Possible Causes:



Air leaks after the MAF sensor, EGR, Intake Manifold or PCV
 
Exhaust system leaks before or near the front HO2S location
 
Fuel system not supplying enough fuel under high fuel demand conditions (i.e., fuel pump weak, fuel filter or fuel injectors dirty)
 
Vehicle running out of fuel, or driven until it runs out of fuel
 
TSB 02-024 (5/02) contains information related to this code
 

Trouble Code: P0172

Fuel Trim Rich (Bank 1):

Trouble Code Conditions: Engine started, engine running at cruise speed in closed loop, and the PCM detected the Bank 1 fuel system indicated a rich condition.

Possible Causes:



Engine oil overfill condition, or camshaft timing is incorrect
 
EVAP recovery system failure (pulling in excessive fuel vapors)
 
HO2S element may be contaminated with water or alcohol
 
Leaking fuel pressure regulator or leaking fuel injector(s)
 
MAF sensor signals invalid (it may be dirty or out of calibration)
 

Trouble Code: P0174

Fuel Trim Lean (Bank 2):

Trouble Code Conditions: Engine started, engine running at cruise speed in closed loop, and the PCM detected the Bank 2 fuel system indicated a lean condition.

Possible Causes:



Air leaks after the MAF sensor, EGR, Intake Manifold or PCV
 
Exhaust system leaks before or near the front HO2S location
 
Fuel system not supplying enough fuel under high fuel demand conditions (i.e., fuel pump weak, fuel filter or fuel injectors dirty)
 
Vehicle running out of fuel, or driven until it runs out of fuel
 

Trouble Code: P0175

Fuel Trim Rich (Bank 2):

Trouble Code Conditions: Engine started, engine running at cruise speed in closed loop, and the PCM detected the Bank 2 fuel system indicated a lean condition.

Possible Causes:



Engine oil overfill condition, or camshaft timing is incorrect
 
EVAP recovery system failure (pulling in excessive fuel vapors)
 
HO2S element may be contaminated with water or alcohol
 
Leaking or contaminated fuel injector(s)
 
Leaking fuel pressure regulator
 
MAF sensor signals invalid (it may be dirty or out of calibration)
 

Trouble Code: P0181

Fuel Tank Temperature Sensor Range/Performance:

Trouble Code Conditions: Engine started, engine running for 5-10 minutes, and the PCM detected the Fuel Tank Temperature (FTT) sensor signal was not plausible when compared to the ECT sensor and IAT sensor signals. Note: The fuel tank temperature sensor should read 3.5v at 68ºF.

Possible Causes:



Fuel tank temperature sensor connector is loose (open circuit)
 
Fuel tank temperature sensor signal open or shorted to ground
 
Fuel tank temperature sensor is damaged or has failed
 

Trouble Code: P0182

Fuel Tank Temperature Sensor Circuit Low Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage (less than 0.20v) on the FTT sensor circuit in the CCM test. Note: The fuel tank temperature sensor should read 3.5v at 68ºF.

Possible Causes:



FTT sensor signal circuit is shorted to ground
 
FTT sensor connector is damaged (causing a short circuit)
 
FTT sensor is damaged or has failed
 

Trouble Code: P0183

Fuel Tank Temperature Sensor Circuit High Input:

Trouble Code Conditions: Key on or engine running; and PCM detected an unexpected high voltage (more than 4.90v) on the FTT sensor circuit in the CCM test. Note: The fuel tank temperature sensor should read 3.5v at 68ºF.

Possible Causes:



FTT sensor connector is damaged (causing an open circuit)
 
FTT sensor signal circuit is open or shorted to VREF
 
FTT sensor ground circuit is open
 
FTT sensor is damaged or has failed
 

Trouble Code: P0222

ETC Throttle Position Sensor 1 Signal Low Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected low voltage on the ETC TP Sensor 1 signal circuit. The ETC Actuator consists of a throttle control motor and TP sensors. The TP sensors respond to movement of the throttle valve. The PCM judges the actual opening angle of the throttle valve from the signals from the TP1 and TP2 sensors during engine operation.

Possible Causes:



ETC TP1 sensor connector is damaged (it may be shorted)
 
ETC TP1 sensor signal circuit is shorted to ground
 
ETC TP1 sensor is damaged or it failed (ETC actuator failure)
 

Trouble Code: P0223

ETC Throttle Position Sensor 1 Signal High Input:

Trouble Code Conditions: Key on or engine running; and the PCM detected an unexpected high voltage on the ETC TP Sensor 1 signal circuit. The ETC Actuator consists of a throttle control motor and TP sensors. The TP sensors respond to movement of the throttle valve. The PCM judges the actual opening angle of the throttle valve from the signals from the TP1 and TP2 sensors during engine operation.

Possible Causes:



ETC TP1 sensor connector is damaged (it may be open)
 
ETC TP1 sensor signal circuit is open between TP1 and PCM
 
ETC TP1 sensor is damaged or it failed (ETC actuator failure)
 

Trouble Code: P0300

Multiple Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS more than 3 mph, and the PCM detected an irregular CKP sensor signal that indicated a multiple misfire condition existed in two or more cylinders during the 200 or 1000 revolution period of the Misfire Monitor test.

Possible Causes:



Base engine problem that affects two or more cylinders
 
CMP or CKP sensor signals erratic or out of phase
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects two or more cylinders (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system problem that affects two or more cylinders
 
Vehicle driven while quite low on fuel (less than 1/8 of a tank)
 

Trouble Code: P0301

Cylinder 1 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 1 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 1
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 1 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 1
 

Trouble Code: P0302

Cylinder 2 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 2 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 2
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 2 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 2
 

Trouble Code: P0303

Cylinder 3 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 3 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 3
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 3 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 3
 

Trouble Code: P0304

Cylinder 4 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 4 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder4
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 4 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 4
 

Trouble Code: P0305

Cylinder 5 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 5 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 5
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 5 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 5
 

Trouble Code: P0306

Cylinder 6 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 6 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 6
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 6 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 6
 

Trouble Code: P0307

Cylinder 7 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 7 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 7
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 7 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 7
 

Trouble Code: P0308

Cylinder 8 Misfire Detected:

Trouble Code Conditions: Engine started, engine speed from 400-3500 rpm, VSS over 3 mph, and the PCM detected an irregular CKP sensor signal indicating a misfire present in Cylinder 8 during the 200 or 1000 revolution test.

Possible Causes:



Base engine mechanical problem that affects only Cylinder 8
 
EGR valve stuck open, or EVAP purge system has failed
 
Fuel delivery component fault that affects only Cylinder 8 (e.g., a contaminated, dirty or sticking fuel injector)
 
Ignition system fault (Coil or Plug) that affects only Cylinder 8
 

Trouble Code: P0327

Knock Sensor Circuit Low Input (Bank 1):

Trouble Code Conditions: Engine started, system voltage over 10.0v, and the PCM detected an excessively low voltage on the Bank 1 Knock sensor circuit. Note: The Knock sensor signal will read 2.5v at idle if no fault exists.

Possible Causes:



Knock sensor signal circuit is shorted to ground
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0328

Knock Sensor Circuit High Input (Bank 1):

Trouble Code Conditions: Engine started, system voltage over 10.0v, and the PCM detected an excessively high voltage on the Bank 1 Knock sensor circuit. Note: The Knock sensor signal will read 2.5v at idle if no fault exists.

Possible Causes:



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

Trouble Code: P0332

Knock Sensor Circuit Low Input (Bank 2):

Trouble Code Conditions: Engine started, system voltage over 10.0v, and the PCM detected an excessively low voltage on the Bank 2 Knock sensor circuit. Note: The Knock sensor signal will read 2.5v at idle if no fault exists.

Possible Causes:



Knock sensor signal circuit is shorted to ground
 
Knock sensor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0333

Knock Sensor Circuit High Input (Bank 2):

Trouble Code Conditions: Engine started, system voltage over 10.0v, and the PCM detected an excessively high voltage on the Bank 2 Knock sensor circuit. Note: The Knock sensor signal will read 2.5v at idle if no fault exists.

Possible Causes:



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

Trouble Code: P0335

Crankshaft Position Sensor Circuit Malfunction:

Trouble Code Conditions: Engine cranking for 2 seconds, and the PCM did not detect a proper CKP sensor (1º) signal, or with engine running, it did not detect a normal pattern of CKP sensor signals.

Possible Causes:



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

Trouble Code: P0340

Camshaft Position Sensor Circuit Malfunction (Bank 1):

Trouble Code Conditions: Engine cranking for over 2 seconds, and the PCM did not detect any CMP sensor signals, or with engine running, the PCM did not detect any CMP signals, or it detected an abnormal CMP sensor pattern.

Possible Causes:



Camshaft (intake) is damaged or has failed (Bank 1)
 
CMP Phase sensor signal circuit is open or shorted to ground
 
CMP Phase sensor is damaged or has failed
 
Low battery voltage condition present during engine cranking
 
Starter motor circuit problem during engine cranking
 
PCM has failed
 

Trouble Code: P0420

Catalyst Efficiency Below Normal (Bank 1):

Trouble Code Conditions: Engine started, ECT sensor signal over 158ºF, vehicle driven at 53-60 mph for 5-6 minutes, and the PCM detected the rear HO2S-22 switch rate was similar to the front HO2S switch rate for 3 seconds.

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is contaminated, damaged or has failed
 
Continuous engine misfire conditions, or low ignition coil output
 
Front HO2S is older (aged) than the rear HO2S (HO2S is lazy)
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Rear HO2S is loose in the mounting hole (check it for a leak)
 

Trouble Code: P0430

Catalyst Efficiency Below Normal (Bank 2):

Trouble Code Conditions: Engine started, ECT sensor signal over 158ºF, vehicle driven at 53-60 mph for 5-6 minutes, and the PCM detected the rear HO2S-22 switch rate was similar to the front HO2S switch rate for 3 seconds.

Possible Causes:



Air leaks at the exhaust manifold or in the exhaust pipes
 
Catalytic converter is contaminated, damaged or has failed
 
Continuous engine misfire conditions, or low ignition coil output
 
Front HO2S is older (aged) than the rear HO2S (HO2S is lazy)
 
Front HO2S or rear HO2S is contaminated with fuel or moisture
 
Rear HO2S is loose in the mounting hole (check it for a leak)
 

Trouble Code: P0441

EVAP System Incorrect Purge Flow Detected:

Trouble Code Conditions: DTC P0226, P0227, P0228, P1227 and P1228 not set, IAT sensor signal from 32-86ºF, ECT sensor signal from 32-158ºF, engine running at cruise, then with the EVAP purge solenoid open, the PCM detected an incorrect amount of pressure drop, or the presence of a leak in the EVAP system during the EVAP Monitor test period.

Possible Causes:



EVAP canister purge volume control solenoid is stuck closed
 
EVAP canister purge volume control solenoid circuit is shorted
 
EVAP control system pressure sensor is damaged or has failed
 
EVAP emission canister or rubber tube is cracked or restricted
 
EVAP purge port is blocked or restricted
 
EVAP canister vent control valve is damaged or has failed
 

Trouble Code: P0442

EVAP System Small Leak (0.040") Detected:

Trouble Code Conditions: DTC P1448 not set, IAT sensor signal from 32-86ºF, ECT sensor signal from 32-158ºF, fuel level from 25-75%, engine started, then after the EVAP cut-valve was opened (to clear the line between the tank and EVAP purge valve), the PCM closed the Vent control valve, opened the Purge Volume Control valve to depressurize the system, and after a period of time, it closed the Purge Volume Control valve, and then the PCM determined a small leak present in the system.

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
 
Small leak in the EVAP canister or in the fuel tank area
 
ORVR system is damaged or has a leak in a component
 
Refueling control valve is damaged or has failed
 
Vacuum hose leaking between intake manifold and Purge valve
 

 
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