P1605 INFINITI Automatic Transmission Communication

Possible causes – Weak battery– Faulty Transmission Control Module (TCM)– Harness is open or shorted between (TCM) and Engine Control Module (ECM)– Poor circuit electrical connection between (TCM) and (ECM) Tech description There is a service bulletin for the 2001 Infiniti I30. 2001 Infiniti I30 Factory Service Bulletin OBDII Code P1605 When is the obd…

P1148 INFINITI Closed Loop Control Function Bank 1

Possible causes For Models 2005 and up:– Faulty Air Fuel Ratio Sensor 1 Bank 1 – Air Fuel Ratio Sensor 1 Bank 1 circuit is open or shorted– Air Fuel Ratio Sensor 1 Bank 1 circuit electrical connection For Models before 2005:– Faulty Heated Oxygen Sensor 1 Bank 1– Heated Oxygen Sensor 1 Bank 1…

P1168 INFINITI Closed Loop Control Function Bank 2

Possible causes For Models 2005 and up:– Faulty Air Fuel Ratio Sensor 1 Bank 2 – Air Fuel Ratio Sensor 1 Bank 2 circuit is open or shorted– Air Fuel Ratio Sensor 1 Bank 2 circuit electrical connection For Models before 2005:– Faulty Heated Oxygen Sensor 1 Bank 2– Heated Oxygen Sensor 1 Bank 2…

C1140 INFINITI Actuator

When is the obd code mean? Actuator solenoid valve relay is ON, even if control unit sends off signal or Actuator solenoid valve relay is OFF, even if control unit sends on Relay, and Circuit signal.

P1217 INFINITI Engine Over Temperature

Possible causes – Thermostat– Cooling fan harness is open or shorted– Cooling fan circuit poor electrical connection– Faulty cooling fan motor– Engine Control Module (ECM) Program – Faulty IPDM E/R – Faulty Cooling fan control module– Radiator hose – Radiator– Radiator cap – Water pump Tech description The most likely cause that will trigger the…

P0420 INFINITI Catalyst System Efficiency Below Threshold Bank 1

Possible causes – Three way catalyst converter Bank 1– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Engine Control Module (ECM) Tech description As the code description implies the P0420 code means that the vehicle’s control module has detected that the three-way…

P0430 INFINITI Catalyst System Efficiency Below Threshold Bank 2

Possible causes – Three way catalyst converter Bank 2– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs may be faulty– Improper ignition timing– Engine Control Module (ECM)- Three way catalyst converter Bank 2– Exhaust tube– Intake air leaks– Fuel injectors may be faulty– Fuel injector leaks– Spark plugs…

P2100 INFINITI Throttle Control Motor Relay Circuit Open

Possible causes – Throttle Control Motor Relay harness is open– Throttle Control Motor Relay circuit poor electrical connection– Faulty Throttle Control Motor Relay Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P2100 INFINITI OBD Code Description Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via…