Possible causes – Input Clutch Solenoid Valve is harness is open or shorted– Input Clutch Solenoid Valve circuit poor electrical connection– Faulty Input clutch solenoid valve Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1754 INFINITI Description

Possible causes – Lack of intake air volume (block air filter)– Fuel injection system (Clogged fuel injector or bad fuel pump)– Faulty Engine Control Module (ECM) When is the code detected? The P1421 code is detected when The Engine Control

Possible causes – Low coast brake solenoid valve harness is open or shorted – Low coast brake solenoid valve circuit poor electrical connection -
Fault low coast brake solenoid valve -
Faulty Automatic Transmission Fluid (ATF) pressure switch 2 When

Possible causes – Low engine coolant level– Faulty Thermostat– Leakage from sealing portion of thermostat– Engine coolant temperature sensor Tech notes If no coolant leaks are present, replacing the thermostat usually takes care of the problem. When is the code

Possible causes – Low engine coolant level– Faulty Thermostat– Leakage from sealing portion of thermostat– Engine coolant temperature sensor Tech notes If no coolant leaks are present, replacing the thermostat usually takes care of the problem. When is the code

Possible causes – Low engine coolant level– Faulty Thermostat– Leakage from sealing portion of thermostat– Engine coolant temperature sensor Tech notes If no coolant leaks are present, replacing the thermostat usually takes care of the problem. When is the code

Possible causes – Low engine coolant level– Faulty Thermostat– Leakage from sealing portion of thermostat– Engine coolant temperature sensor Tech notes If no coolant leaks are present, replacing the thermostat usually takes care of the problem. When is the code

Possible causes – Low engine coolant level– Faulty Thermostat– Leakage from sealing portion of thermostat– Engine coolant temperature sensor Tech notes If no coolant leaks are present, replacing the thermostat usually takes care of the problem. For Infiniti vehicles other

Possible causes – Low engine coolant level– Faulty Thermostat– Leakage from sealing portion of thermostat– Engine coolant temperature sensor Tech notes If no coolant leaks are present, replacing the thermostat usually takes care of the problem. When is the code

Possible causes – Missing Fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– Incorrect fuel tank vacuum relief valve– Leak is in line between intake manifold

Possible causes – Missing or loose fuel cap– Incorrect fuel filler cap used– Fuel filler cap remains open or fails to close– Foreign matter caught in fuel filler cap– EVAP canister or fuel tank leaks– EVAP system hose leaking– Fuel

Possible causes – The EGR volume control valve circuit harness is open or shorted– EGR volume control valve leaking or stuck open– Faulty EGR temperature sensor Tech notes Start by cleaning the EGR valve, if the code persist it may

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–

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 Description Power supply for

Possible causes – Vacuum cut valve bypass valve– Vacuum cut valve– Bypass hoses for clogging– EVAP control system pressure sensor and circuit– EVAP canister vent control valve– Hose between fuel tank and vacuum cut valve clogged– Hose between vacuum cut

Possible causes – VDC/TCS/ABS to ECM circuit harness is open or shorted– TCM to ECM circuit harness is open or shorted– VDC/TCS/ABS to ECM circuit connectors – TCM to ECM circuit connectors – Faulty revolution sensor When is the code

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 notes There is a service bulletin for the 2001

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

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