Possible causes – Air fuel ratio (A/F) Harness or connectors is open or shorted – Air fuel ratio (A/F) sensor 1 Bank 1– Air fuel ratio (A/F) sensor 1 heater Bank 1 – Fuel pressure – Fuel injector – Intake
Possible causes – Air fuel ratio (A/F) Harness or connectors is open or shorted– Air fuel ratio (A/F) sensor 1 Bank 1– Air fuel ratio (A/F) sensor 1 heater Bank 1– Fuel pressure– Fuel injector– Intake air leaks– Exhaust Gas
Possible causes – Air fuel ratio (A/F) Harness or connectors is open or shorted– Air fuel ratio (A/F) sensor 1 Bank 1– Air fuel ratio (A/F) sensor 1 heater Bank 1– Fuel pressure– Fuel injector– Intake air leaks– Exhaust Gas
Possible causes – Fuel metering solenoid harness is open or shorted – Fuel metering solenoid electrical circuit poor connection – Faulty fuel metering solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
Possible causes – Fuel metering solenoid harness is open or shorted – Fuel metering solenoid electrical circuit poor connection – Faulty fuel metering solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
P1278 FORD – Cylinder #8 High To Low Side Open
P1278 GMC – Accelerator Pedal Position Sensor 1 Circuit High Voltage
P1278 BUICK – Accelerator Pedal Position Sensor 1 Circuit High Voltage
P1278 CADILLAC – Accelerator Pedal Position Sensor 1 Circuit High Voltage
P1278 CHEVROLET – Accelerator Pedal Position Sensor 1 Circuit High Voltage
P1278 DODGE – Accelerator Pedal Pos Sens1-2 Correlation