Possible causes – Faulty Engine Brake Driver Relay– Engine Brake Driver harness is open or shorted– Engine Brake Driver circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected that the signal from the
Possible causes – Faulty Engine Brake Driver Relay– Engine Brake Driver harness is open or shorted– Engine Brake Driver circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected that the signal from the
Possible causes – Faulty Engine Brake Driver Relay– Engine Brake Driver harness is open or shorted– Engine Brake Driver circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected that the signal from the
Possible causes – Faulty Exhaust Back Pressure Valve– Exhaust Back Pressure Valve harness is open or shorted– Exhaust Back Pressure Valve circuit poor electrical connection Tech notes Check the Exhaust Back Pressure Valve (EBPV) butterfly valve is opening and closing
Possible causes – Faulty Exhaust Back Pressure Valve– Exhaust Back Pressure Valve harness is open or shorted– Exhaust Back Pressure Valve circuit poor electrical connection Tech notes Check the Exhaust Back Pressure Valve (EBPV) butterfly valve is opening and closing
Possible causes – Faulty Exhaust Back Pressure Valve– Exhaust Back Pressure Valve harness is open or shorted– Exhaust Back Pressure Valve circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)