Possible causes – Low transmission fluid level– 3rd Clutch Pressure Switch harness is open or shorted– 3rd Clutch Pressure Switch circuit poor electrical connection– Faulty 3rd Clutch Pressure Switch Symptoms – Engine Light ON (or Service Engine Soon Warning Light

Possible causes – Low transmission fluid level– Dirty transmission fluid– Torque Converter Clutch Solenoid harness is open or shorted– Torque Converter Clutch Solenoid circuit poor electrical connection– Faulty Torque Converter Clutch Solenoid Tech notes Some Acura may have a short

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 Tech notes There is a Honda factory service bulletin with information on how

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 Tech notes Usually loose or bad fuel tank filler cap will triggered this

Possible causes – Poor connection at the AC motor control module – Open or short circuit condition – Failed AC Motor Control Module When is the code detected? No duty signals are input from the MCM for at least 5

Possible causes – Plugged fuel filter or low fuel pressure– Faulty or dirty Mass Air Flow sensor Symptoms – Engine Light ON (or Service Engine Soon Warning Light) HONDA Technical Service Bulletins for P1171 code 1998 HONDA PASSPORT VEHICLE SPEED

Possible causes – Rear A/F Sensor Sensor 1 Bank 1 harness is open or shorted– Rear A/F Sensor Sensor 1 Bank 1 electrical circuit poor connection– Faulty Rear A/F Sensor Sensor 1 Bank 1– Vacuum leak– Low fuel pressure Tech

Possible causes – Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted– Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 circuit poor electrical connection– Faulty Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 Symptoms – Engine

Possible causes – Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1 harness is open or shorted– Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1 circuit poor electrical connection– Faulty Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1 Symptoms – Engine

Possible causes – Throttle Actuator Control Module harness open or shorted– Throttle Actuator Control Module circuit poor electrical connection– Check throttle body for binding-Clean throttle body– Throttle body actuator malfunction– Defective throttle body Symptoms – Engine Light ON (or Service

Possible causes – Throttle Actuator Control Module harness open or shorted– Throttle Actuator Control Module circuit poor electrical connection– Check throttle body for binding-Clean throttle body– Throttle body actuator malfunction– Defective throttle body Symptoms – Engine Light ON (or Service

Possible causes – Top Dead Center Sensor 1 harness open or shorted – Top Dead Center Sensor 1 circuit poor electrical connection – Faulty Top Dead Center Sensor 1 Tech notes Some Honda models Top Dead Center (TDC) sensor location:

Possible causes – Top Dead Center Sensor 2 harness open or shorted – Top Dead Center Sensor 2 circuit poor electrical connection – Faulty Top Dead Center Sensor 2 Tech notes Some Honda models Top Dead Center (TDC) sensor location:

Possible causes – Top Dead Center Sensor 2 harness open or shorted – Top Dead Center Sensor 2 circuit poor electrical connection – Faulty Top Dead Center Sensor 2 Tech notes Some Honda models Top Dead Center (TDC) sensor location:

Possible causes – Valve pause system harness is open or shorter– Valve pause system circuit poor electrical connection– Faulty rocker arm oil pressure switch– Faulty rocker arm control solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Tech notes There is a factory service bulletin for the following Honda Models: 2003 Honda Accord 2004 Honda Accord Honda Accord Factory Service Bulletin OBDII Code P2197 Symptoms – Engine Light ON (or Service Engine Soon Warning Light) – Excessive

Tech notes There are seven (7) codes listed on the service manual for the P1647 code. Try reseting the code first, and if the code comes back, check fuses and the Engine Control Module (ECM) connector. P1647 HONDA Description P1647

Symptoms – Engine Light ON (or Service Engine Soon Warning Light) HONDA Technical Service Bulletins for P1021 code 2003 HONDA CIVIC ELECTRICAL SYSTEM 2004 HONDA CIVIC ELECTRICAL SYSTEM 2005 HONDA CIVIC ELECTRICAL SYSTEM 2003 HONDA CIVIC ENGINE AND ENGINE COOLING:ENGINE

Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Symptoms – Engine Light ON (or Service Engine Soon Warning Light)