Infinity_QX4_1998-2003

TroubleCodes (9 of 11)

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3.5L V6 - Auto



Trouble Code: P0154

HO2S-21 (Bank 2 Sensor 1) Insufficient Activity Detected:

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-21 signal was fixed under 300 mv, or the HO2S signal was fixed over 600 mv for 10 seconds, or the HO2S signal switched from rich to lean less than 5 times in 10 seconds.

Possible Causes:



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

Trouble Code: P0155

HO2S-21 (Bank 2 Sensor 1) Heater Circuit Malfunction:

Trouble Code Conditions: Engine started, engine speed less than 3000 rpm, and the PCM detected an unexpected voltage on the HO2S heater circuit. Note: The current level of the HO2S circuit was too high or too low.

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to power
 
HO2S heater is damaged or has failed
 
PCM has failed
 

Trouble Code: P0157

HO2S-22 (Bank 2 Sensor 2) Circuit Low Input (Lean 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 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: 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)
 
TSB 02-008 (5/02) contains information related to this code
 

Trouble Code: P0160

HO2S-22 (Bank 2 Sensor 2) Insufficient Activity Detected:

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 signal was fixed under 300 mv, or the HO2S signal was fixed over 600 mv for 10 seconds, or the HO2S signal switched from rich to lean less than 5 times in 10 seconds.

Possible Causes:



HO2S element is contaminated
 
HO2S heater is damaged or has failed
 
HO2S signal circuit is open or shorted to ground
 
HO2S is damaged or it has failed
 
TSB 02-008 (5/02) contains information related to this code
 

Trouble Code: P0161

HO2S-22 (Bank 2 Sensor 2) Heater Circuit Malfunction:

Trouble Code Conditions: Engine started, engine speed less than 3000 rpm, and the PCM detected an unexpected voltage on the HO2S heater circuit. Note: The current level of the HO2S circuit was too high or too low.

Possible Causes:



HO2S heater control circuit is open or shorted to ground
 
HO2S heater control circuit is shorted to power
 
HO2S heater is damaged or has failed
 
PCM has failed
 

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: P0217

Engine Over-Temperature Condition Detected:

Trouble Code Conditions: Engine started, engine running in closed loop, IAT sensor from 14-122ºF, and the PCM detected the ECT sensor signal indicated that the engine temperature was high under "low" engine load conditions.

Possible Causes:



Blocked air passages at front of the vehicle (recent damage-)
 
Blocked or restricted radiator passages
 
Cooling fan control circuit open or shorted to ground
 
Cooling system problems (low coolant, thermostat closed)
 

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: 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: 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:

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 a normal pattern of CMP signals during the CCM test.

Possible Causes:



CMP sensor signal circuit is open or shorted to ground
 
CMP sensor signal is shorted to VREF or system power
 
CMP sensor is damaged or has failed
 
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: P0440

EVAP System Small Leak (0.040") Detected:

Trouble Code Conditions: DTC P1440 and P1448 not set, engine started, IAT sensor from 32-86ºF, ECT sensor from 32-158ºF, Fuel Level from 25-75%, EVAP purge and vent solenoids both enabled, and the PCM detected the presence of a leak in the EVAP system during the EVAP leak test. Note: If DTC P1448 is set, repair the cause of this trouble code first.

Possible Causes:



EVAP purge solenoid is damaged or has failed
 
EVAP emission canister clogged or restricted
 
Fuel tank cap loose, damaged or missing, or vacuum line is off
 
TSB 00-046 (7/00) contains information related to this code
 

Trouble Code: P0443

EVAP Canister Purge Solenoid Circuit Malfunction:

Trouble Code Conditions: Engine running at cruise speed with light engine load, and the PCM detected an unexpected voltage condition on the Purge solenoid circuit, or it detected an invalid EVAP signal present with the Purge solenoid commanded "on" and "off" during the CCM test period.

Possible Causes:



Purge solenoid connector is damaged/loose (intermittent fault)
 
Purge solenoid control circuit open, shorted to ground or power
 
Purge solenoid is damaged or has failed
 
PCM has failed
 
TSB 00-046 (7/00) contains information related to this code
 

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: P0446

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: P0450

EVAP Pressure Sensor Circuit Malfunction:

Trouble Code Conditions: Engine started engine running at idle speed, VSS at 0 mph, EVAP purge commanded "on", and the PCM detected an unexpected condition on the EVAP Pressure sensor signal during the CCM test.

Possible Causes:



EVAP pressure sensor circuit is open, shorted to ground or B+
 
EVAP pressure sensor is damaged or has failed
 
PCM is damaged
 
TSB 00-046 (7/00) contains information related to this code
 

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: P0460

Fuel Level Sensor Slosh Or Noise Detected:

Trouble Code Conditions: Engine started, engine running with gear selector in Park (vehicle not moving), and the PCM detected too much variation in the Fuel Level sensor input (i.e., a "noise" condition with the vehicle stopped).

Possible Causes:



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

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: 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: P0464

Fuel Level Sensor Circuit Malfunction:

Trouble Code Conditions: Engine running for 5 seconds, and the PCM detected an unexpected high or low voltage condition on the Fuel Level sensor circuit.

Possible Causes:



Fuel level sensor connector is damaged or loose (intermittent)
 
Fuel level sensor signal circuit is open or shorted to ground
 
Fuel level sensor signal circuit shorted to VREF or power (B+)
 
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
 

 
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