Infiniti Car 1998-05

3.5L V6 - Std 3

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Trouble Code: P1147



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

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):

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):

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):

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):

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):

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):

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:

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:

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:

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:

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:

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:

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:

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:

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:

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
 

Trouble Code: P1564



ASCD Steering Switch Circuit Malfunction:

Possible Causes:



ASCD steering switch connector is damaged or loose
 
ASCD steering switch signal circuit is open
 
ASCD steering switch signal circuit is shorted to ground
 
ASCD steering switch is damaged or has failed
 

Trouble Code: P1568



ASCD Command Valve Circuit Malfunction:

Possible Causes:



CAN communication line is open, shorted to ground or power
 
ICC unit is damaged or has failed
 
PCM has failed
 

Trouble Code: P1572



ASCD Brake Switch Circuit Malfunction:

Possible Causes:



ASCD switch connector is damaged, loose or shorted
 
ASCD or stop lamp switch is incorrectly installed or positioned
 
ASCD or stop lamp switch circuit is open or shorted to ground
 
ASCD or stop lamp switch is damaged or has failed
 

Trouble Code: P1574



ASCD Vehicle Speed Sensor Signal Malfunction:

Possible Causes:



CAN communication connector is damaged or loose (open)
 
CAN communication line is open, shorted to power or to ground
 
Combination Meter VSS circuit is open or shorted to ground
 
Combination Meter is damaged or has failed
 
Vehicle Speed sensor is damaged or has failed
 

Trouble Code: P1805



A/T Brake Switch Circuit Malfunction:

Possible Causes:



Stop lamp switch connector is damaged or loose (open circuit)
 
Stop lamp switch power circuit is open (test the No. 2 15A fuse)
 
Stop lamp switch is damaged or has failed (it may be shorted)
 

Trouble Code: P2122



Accelerator Pedal Position Sensor 1 Signal Low Input:

Possible Causes:



APP1 sensor connector is damaged (it may be shorted)
 
APP1 sensor signal circuit is shorted to ground
 
APP1 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P2123



Accelerator Pedal Position Sensor 1 Signal High Input:

Possible Causes:



APP1 sensor connector is damaged (it may be open)
 
APP1 sensor signal circuit is shorted to VREF or system power
 
APP1 sensor signal circuit is damaged or has failed
 
TSB 01-064 (10/19/01) contains information related to this code
 

Trouble Code: P2127



Accelerator Pedal Position Sensor 2 Signal Low Input:

Possible Causes:



APP2 sensor connector is damaged (it may be shorted)
 
APP2 sensor signal circuit is shorted to ground
 
APP2 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P2128



Accelerator Pedal Position Sensor 2 Signal High Input:

Possible Causes:



APP2 sensor connector is damaged (it may be open)
 
APP2 sensor signal circuit is shorted to VREF or system power
 
APP2 sensor signal circuit is damaged or has failed
 

Trouble Code: P2135



Throttle Position Sensor Range/Performance:

Possible Causes:



TP1 or TP2 sensor connector is damaged (open or shorted)
 
TP1 sensor signal circuit is open or shorted to ground
 
TP1 sensor signal circuit is damaged or has failed
 
TP2 sensor signal circuit is open or shorted to ground
 
TP2 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: P2138



Accelerator Pedal Position Sensor Range/Performance:

Possible Causes:



APP1 or APP2 sensor connector is damaged (open or shorted)
 
APP1 sensor signal circuit is open or shorted to ground
 
APP1 sensor signal circuit is damaged or has failed
 
APP2 sensor signal circuit is open or shorted to ground
 
APP2 sensor signal circuit is damaged or has failed
 
PCM is damaged or has failed
 

Trouble Code: U1000



Controller Area Network Line Malfunction:

Possible Causes:



CAN connector is damaged or is disconnected
 
CAN communication line is open, shorted to ground or to power
 
One of the modules is shorted and pulling the CAN voltage low
 

Trouble Code: U1001



Controller Area Network Line Malfunction:

Possible Causes:



CAN connector is damaged or is disconnected
 
CAN communication line is open, shorted to ground or to power
 
One of the modules is shorted and pulling the CAN voltage low
 

 
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