Possible causes – Faulty air fuel ratio (A/F) sensor 1 heater Bank 1 – Air fuel ratio (A/F) harness is open or shorted– Air fuel ratio (A/F) circuit poor electrical connection When is the code detected? The A/F signal computed
Possible causes – Faulty air fuel ratio (A/F) sensor 1 heater Bank 1 – Air fuel ratio (A/F) harness is open or shorted– Air fuel ratio (A/F) circuit poor electrical connection When is the code detected? The A/F signal computed
Possible causes Harness or connectors (The A/F sensor 1 circuit is open or shorted.) Air fuel ratio (A/F) sensor 1 When is the code detected? The A/F signal computed by ECM from the A/F sensor 1 (Bank 1) signal is
P1272 BUICK – Accelerator Pedal Position Sensor 2
P1272 CADILLAC – Accelerator Pedal Position Sensor 2
P1272 CHEVROLET – Accelerator Pedal Position Sensor 2
P1272 DODGE – Inj Pump Timing Offset
P1272 FORD – Cylinder #2 High To Low Side Open
P1272 GMC – Accelerator Pedal Position Sensor 2