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
CHEVROLET Technical Service Bulletins for P1276 code 1999 CHEVROLET B7 VEHICLE SPEED CONTROL:LINKAGES 1999 CHEVROLET G2 VAN VEHICLE SPEED CONTROL:LINKAGES 1999 CHEVROLET G3 VAN VEHICLE SPEED CONTROL:LINKAGES
GMC Technical Service Bulletins for P1276 code 1999 GMC B7 VEHICLE SPEED CONTROL:LINKAGES 1999 GMC G2 VAN VEHICLE SPEED CONTROL:LINKAGES 1999 GMC G3 VAN VEHICLE SPEED CONTROL:LINKAGES
P1276 FORD – Cylinder #6 High To Low Side Open
P1276 BUICK – Accelerator Pedal Position Sensor 1 Performance
P1276 CADILLAC – Accelerator Pedal Position Sensor 1 Performance