P0078 Cadillac Exhaust Valve Timing Control Magnet Retarder Circuit Bank 1
Possible causes
– Faulty Exhaust Valve Timing Control Magnet Retarder
– Exhaust Valve Timing Control Magnet Retarder harness is open or shorted
– Exhaust Valve Timing Control Magnet Retarder circuit poor electrical circuit connector
– Exhaust Valve Timing Control Magnet Retarder harness is open or shorted
– Exhaust Valve Timing Control Magnet Retarder circuit poor electrical circuit connector
What about the obd code?
An improper voltage is sent to the Engine Control Module (ECM) through exhaust valve timing control magnet retarder.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0078 Cadillac Description
Exhaust valve timing control magnet retarder controls the shut/open timing of the exhaust valve by ON/OFF pulse duty signals sent from the Engine Control Module (ECM). The longer pulse width retards valve angle. The shorter pulse width advances valve angle.
Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac Catera , Cadillac DTS , Cadillac DeVille , Cadillac STS-V , Cadillac STS , Cadillac Seville , Cadillac XTS , Cadillac XLR , Cadillac XLR Platinum , Cadillac Escalade , Cadillac SRX