Possible causes – Faulty Rear Heated Oxygen Sensor Bank 1– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection– Inappropriate fuel pressure– Faulty fuel injectors– Intake air leaks

Possible causes – Repair other codes first Tech notes If the P1380 code is set with other codes, repair other codes first and then clear the code. When is the code detected? If the Electronic Brake Control Module (EBCM) detects

Possible causes – Repair other codes first Tech notes If the P1381 code is set with other codes, repair other codes first and then clear the code. When is the code detected? If a loss of communication occurs which causes