Infinity_QX4_1998-2003

TroubleCodes (2 of 11)

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3.3L V6 - Auto



3.3L V6 - Auto

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: P0130

HO2S-11 (Bank 1 Sensor 1) Closed Loop Fuel Control:

Trouble Code Conditions: Engine started, and after the vehicle was driven at a speed of 30-55 mph for 2 minutes, the PCM detected the HO2S signal voltage was excessively high or low, or it detected the HO2S signal did not reach the maximum or minimum voltages, or it took too long for the HO2S signal to switch from rich-to-lean or from lean-to-rich during the test.

Possible Causes:



HO2S signal circuit is open or shorted to ground
 
HO2S is damaged or it has failed
 
PCM has failed
 

Trouble Code: P0131

HO2S-11 (Bank 1 Sensor 1) 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-11 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 heater is damaged or has failed
 
HO2S is contaminated or it has failed
 
PCM has failed
 

Trouble Code: P0132

HO2S-11 (Bank 1 Sensor 1) 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 while in closed loop, and the PCM detected the minimum HO2S-11signal was more than 600 mv.

Possible Causes:



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

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: P0134

HO2S-11 (Bank 1 Sensor 1) Insufficient Activity Detected:

Trouble Code Conditions: Engine started, vehicle driven at over 20 mph while in closed loop, IAT sensor signal from 14-122ºF, 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 it detected that the HO2S-11 input switched from rich to lean less than 5 times in a 10 second period.

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal circuit is open or shorted to ground
 
HO2S is damaged, has fuel contamination or has failed
 
TSB 02-024 (5/02) contains information related to this code
 

Trouble Code: P0135

HO2S-11 (Bank 1 Sensor 1) Heater Circuit Malfunction:

Trouble Code Conditions: Engine started, engine running in closed loop at under 3000 rpm, and the PCM detected an unexpected voltage condition (either too high or too low a voltage) on the HO2S-11 heater circuit.

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: 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: P0140

HO2S-12 (Bank 1 Sensor 2) Insufficient Activity Detected:

Trouble Code Conditions: Engine started, IAT sensor signal from 14-122ºF, fuel level over 25%, engine running at over 20 mph in closed loop, and the PCM detected the HO2S signal was fixed under 300 mv or over 600 mv, or it switched from rich to lean less than 5 times in 10 seconds.

Possible Causes:



HO2S heater is damaged or has failed
 
HO2S signal circuit is open or shorted to ground
 
HO2S element is contaminated, damaged or it has failed
 
TSB 02-022 (4/02) contains information related to this code
 

Trouble Code: P0141

HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction:

Trouble Code Conditions: Engine running in closed loop at 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 contaminated, damaged or it has failed
 
PCM has failed
 

Trouble Code: P0150

HO2S-21 (Bank 2 Sensor 1) Closed Loop Fuel Control:

Trouble Code Conditions: Engine started, vehicle driven at a speed of 30-55 mph for 2 minutes, and the PCM detected the HO2S signal was excessively high or low, or it detected the HO2S signal did not reach the maximum or minimum voltages, or it took too long for the HO2S signal to switch from rich to lean.

Possible Causes:



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

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: 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: 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: 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: P0400

EGR System Recirculation Flow:

Trouble Code Conditions: Engine started, vehicle driven to a speed of 19-35 mph at an engine speed of 1952-2400 rpm in closed loop, ECT sensor more than 158ºF, and the PCM detected the EGR Temperature sensor indicated too little or too much EGR flow with the Dual EGR/EVAP solenoid switched "on" and "off" during the EGR Monitor test.

Possible Causes:



EGR gas temperature sensor is damaged or has failed
 
EGR valve is stuck partially open or closed
 
Dual EGR/EVAP solenoid is damaged or has failed
 
Exhaust system is damaged or has collapsed
 

Trouble Code: P0402

EGRC-BPT Valve Function

Trouble Code Conditions: Engine started, engine speed at 1952-2400 rpm in closed loop, ECT sensor input more than 158ºF, VSS over 19-35 mph, and the PCM detected an unexpected voltage on the EGRC-BPT valve circuit.

Possible Causes:



EGRC-BPT solenoid control circuit is open or shorted to ground
 
EGRC-BPT valve vacuum hose is clogged or disconnected
 
Orifice missing in vacuum hose between EGRC-BPT valve and the EGRC solenoid valve
 
Exhaust system is damaged or has collapsed
 

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: 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
 

 
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