Possible causes

– Faulty Variable Camshaft Timing (VCT) position solenoid
– Variable Camshaft Timing (VCT) position harness is open or shorted
– Variable Camshaft Timing (VCT) position circuit poor electrical connection

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of power
– Engine rough idle

P0020 FORD Description

The Engine Control Module (ECM) has detected a low voltage on the VVariable Camshaft Timing (VCT) circuit