Possible causes
– Failed Camshaft Actuator
– Variable Camshaft Timing Actuator harness is open or shorted
– Variable Camshaft Timing Actuator circuit poor electrical connection
– Engine mechanical problems
– Variable Camshaft Timing Actuator harness is open or shorted
– Variable Camshaft Timing Actuator circuit poor electrical connection
– Engine mechanical problems
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of power
– Engine rough idle
– Lack/Loss of power
– Engine rough idle
P0020 BMW Description
Variable Camshaft Timing ‘A’ (VANOS) Circuit Continuity