Possible causes – Faulty Air fuel ratio (A/F) sensor 1 Bank 1 – Faulty Air fuel ratio (A/F) sensor 1 heater Bank 1 – Fuel pressure– Faulty Fuel injector – Faulty Air Flow Meter Tech notes If one or more
Possible causes – Faulty Air fuel ratio (A/F) sensor 1 Bank 1 – Faulty Air fuel ratio (A/F) sensor 1 heater Bank 1 – Fuel pressure– Faulty Fuel injector – Faulty Air Flow Meter Tech notes If one or more
Possible causes Air fuel ratio (A/F) sensor 1 Air fuel ratio (A/F) sensor 1 heater Fuel pressure Fuel injector When is the code detected? The output voltage computed by ECM from the A/F sensor 1 (Bank 1) signal is shifted
P1274 GMC – Injectors Wired Incorrectly
P1274 BUICK – Injectors Wired Incorrectly
P1274 CADILLAC – Injectors Wired Incorrectly
P1274 CHEVROLET – Injectors Wired Incorrectly
P1274 FORD – Cylinder #4 High To Low Side Open