Possible Causes
Engine oil level
Dirty engine oil
Check VTC Strainer for blockage
Faulty VTC Oil Control Solenoid or circuit
Faulty VTC Actuator
Engine mechanical problems
الأسباب المحتملة
Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
الأعراض المحتملة
Description
The variable valve timing control (VTC) system controls the phase of the intake camshaft. It uses oil pressure to operate the VTC actuator, so the valve timing is optimized depending on driving conditions. The Engine Control Module (ECM)/Powertrain control module (PCM) monitors the phase control command and the actual timing of the camshaft by using the camshaft position
(CMP) sensor A. If an over-advanced camshaft phase (compared to the directed value) continues or when the camshaft phase is otherwise abnormal, a malfunction is detected, and a Diagnostic Trouble Code (DTC) is stored.
