Possible causes – Faulty heated oxygen (O2) sensor 2 (rear)– Intake air leaks– Heated oxygen (O2) sensor 2 (rear) harness is open or shorted– Heated oxygen (O2) sensor 2 (rear) circuit poor electrical connection – Inappropriate fuel pressure– Faulty fuel injectors Tech description Replacing the O2 Sensor 2 usually takes care of the problem When…