Possible causes
– Faulty Valvetronic Control Motor
– Valvetronic Control Motor harness is open or shorted
– Valvetronic Control Motor circuit poor electrical connection
– Valvetronic Control Motor harness is open or shorted
– Valvetronic Control Motor circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1078 BMW Description
VVT overload protection control motor current high input bank 1