Infiniti G20 – I30 – QX4 (1999 – 2002) Trouble Code Info

Model Year Engine identification System
G20 2.0L 1999-02 SR20DE ECCS
I30 3.0L 2000-01 VQ30DE ECCS
QX4 3.5L 2001 VQ35DE ECCS

General information

  • Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults.
  • Engine control module (ECM) incorporates self-diagnosis function.
  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
  • ECM operates in backup mode if sensors fail, to enable vehicle to be driven to workshop.


  • Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC) 1.


  • After the faults have been rectified, trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC) 1.

Trouble code  identification

OBD-11 code Fault location Probable cause
PO,P2,UO Refer to OBD-11 trouble code tables
P1110 Camshaft position (CMP) actuator, intake, bank 1 Wiring, CMP actuator, CMP actuator position sensor, CMP sensor, CKP sensor
P1111 Camshaft position (CMP) actuator, intake, bank 1 – circuit malfunction Wiring, CMP actuator
P1126 Thermostat – stuck open Wiring, thermostat, ECT sensor
P1130 Intake manifold air control solenoid – circuit malfunction Wiring, control solenoid, intake system, hose leak/blockage, control vacuum check switch, MAF sensor, TP sensor, CKP sensor
P1135 Camshaft position (CMP) actuator, intake, bank 2 Wiring, CMP actuator, CMP actuator position sensor, CMP sensor, CKP sensor
P1136 Camshaft position (CMP) actuator, intake, bank 2 – circuit malfunction Wiring, CMP actuator
P1140 Camshaft position (CMP) actuator position sensor, intake, bank 2 – circuit malfunction Wiring, CMP actuator, CMP actuator position sensor, CMP sensor, CKP sensor
P1145 Camshaft position (CMP) actuator position sensor, intake, bank 2 – circuit malfunction Wiring, CMP actuator, CMP actuator position sensor, CMP sensor, CKP sensor
P1148 Closed loop control, bank 1 Wiring, H02S, oxygen sensor heater
P1165 Intake manifold air control vacuum check switch Wiring, control solenoid, intake system, hose leak/blockage, control vacuum check switch
P1168 Closed loop control, bank 2 Wiring, H025, oxygen sensor heater
P1211 TCS function – malfunction TCS system, ABSfTCS control module, ECM
P1212 TCS communication – circuit malfunction Wiring, ABSfTCS control module, ECM
P1217 Engine overheating Thermostat, cooling system
P1320 Ignition signal, primary – circuit malfunction Wiring, ignition amplifier, audio unit suppresser, CKP sensor
P1335 Crankshaft position (CKP) sensor – circuit malfunction Wiring, CKP sensor
P1336 Crankshaft position (CKP) sensor – circuit malfunction Wiring, CKP sensor, mechanical fault
P1401 Exhaust gas recirculation temperature (EGRT)   sensor – circuit malfunction Wiring, EGRT sensor, ECM
P1402 Exhaust gas recirculation (EGR) system – excessive flow Wiring, EGRIEVAP valve, EGR valve, EGRT   sensor, EGR back pressure transducer, ECM
P1440 Evaporative emission (EVAP) canister purge system – leaking/malfunction Wiring, fuel tank/cap, hose leak/blockage, EVAP valve/canister, EVAP vent valve, BARO sensor, MAP/BARO switching valve, ECM
P1441 Evaporative emission (EVAP) canister purge control system – small leak EVAP valve, hoses, fuel filler cap, mechanical fault
P1444 Evaporative emission (EVAP) canister purge valve – circuit malfunction Wiring, EVAP canister purge valve, hoses, EVAP pressure sensor, EVAP canister, mechanical fault
P1446 Evaporative emission (EVAP) canister vent valve – close Hoses, EVAP vent valve, EVAP pressure sensor, EVAP canister
P1447 Evaporative emission (EVAP) canister purge flow monitoring EVAP canister purge valve, hoses, EVAP   pressure sensor, EVAP canister
P1448 Evaporative emission (EVAP) canister vent valve- open Hoses, EVAP vent valve, EVAP pressure sensor, EVAP canister
P1464 Fuel gauge tank sensor- circuit malfunction Wiring, fuel gauge tank sensor
P1490 Evaporative emission (EVAP) vacuum cut bypass valve – circuit malfunction Wiring, EVAP vacuum cut bypass valve
P1491 Evaporative emission (EVAP) vacuum cut bypass valve Hoses, EVAP vacuum cut bypass valve, EVAP pressure sensor, EVAP canister, EVAP canister vent valve
P1605 Diagnosis communication, AT – circuit malfunction Wiring, TCM
P1610 Imobilizer Wiring, imobilizer control module, incorrect key
P1615 Imobilizer Wiring, imobilizer control module, incorrect key
P1705 Throttle position (TP) sensor, AT – circuit malfunction Wiring, TP sensor, mechanical fault, ECM
P1706 Park neutral position (PNP) switch – circuit malfunction Wiring, PNP switch, mechanical fault, ECM
P1760 Overrun clutch solenoid, AT- circuit malfunction Wiring, solenoid, mechanical fault