Possible causes – Faulty Intake Valve Timing Control Solenoid Valve – Intake Valve Timing Control Solenoid Valve harness is open or shorted – Intake Valve Timing Control Solenoid Valve circuit poor electrical connection – Faulty Camshaft Position Sensor – Camshaft
Possible causes – Dirty engine oil– Low engine oil level– Faulty camshaft actuator– Camshaft actuator circuit open or shorted– Camshaft actuator circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine
Possible causes – Dirty engine oil– Low engine oil level– Faulty camshaft actuator– Camshaft actuator circuit open or shorted– Camshaft actuator circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine
Possible causes – Dirty engine oil– Low engine oil level– Faulty Oil Control Valve– Engine mechanical problems Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine rough idle P0021 KIA Description The CVVT (Continuously
Possible causes – Dirty engine oil– Low engine oil level– Faulty Oil Control Valve– Engine mechanical problems Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine rough idle P0021 2008 KIA OPTIMA Description The
Possible causes – Dirty engine oil– Low engine oil level– Incorrect timing– Engine mechanical problems– Faulty actuator Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine rough idle
Possible causes – Dirty engine oil– Low engine oil level– Timing belt misalign– Faulty AVCS solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine rough idle
Possible causes – Dirty Oil– Faulty variable valve timing (VVT)– Variable Valve Timing (VVT) circuit is open or shorted– Oil Control Valve (OCV) circuit is open or shorted– Faulty oil control valve (OCV)– Damaged Engine Control Module (ECM) Tech notes
Possible causes – Dirty Oil– Faulty variable valve timing (VVT)– Variable Valve Timing (VVT) circuit is open or shorted– Oil Control Valve (OCV) circuit is open or shorted– Faulty oil control valve (OCV)– Damaged Engine Control Module (ECM) Tech notes
Possible causes – Dirty Oil– Faulty variable valve timing (VVT)– Variable Valve Timing (VVT) circuit is open or shorted– Oil Control Valve (OCV) circuit is open or shorted– Faulty oil control valve (OCV)– Damaged Engine Control Module (ECM) When is
Possible causes – Failed Camshaft Actuator– Variable Camshaft Timing Circuit open or shorted– Variable Camshaft Timing Circuit poor electrical connection– Engine mechanical problems Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine rough idle
Possible causes – Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is open or shorted– Camshaft Position Sensor circuit poor electrical connection– Faulty Intake Valve Timing Control Solenoid Valve– Intake Valve Timing Control Solenoid Valve harness is open or shorted–
Possible causes – Faulty Intake Valve Timing Control Solenoid Valve– Intake Valve Timing Control Solenoid Valve harness is open or shorted– Intake Valve Timing Control Solenoid Valve circuit poor electrical connection– Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is
Possible causes – Faulty Intake Valve Timing Control Solenoid Valve– Intake Valve Timing Control Solenoid Valve harness is open or shorted– Intake Valve Timing Control Solenoid Valve circuit poor electrical connection– Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is
Possible causes – Incorrect camshaft timing– Faulty Valve Control Timing (VCT) position solenoid– Valve Control Timing (VCT) position circuit is open or shorted– Valve Control Timing (VCT) position circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine
Possible causes – Variable camshaft timing actuator stuck in advance position– Timing belt jumped Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine rough idle MAZDA Technical Service Bulletins for P0021 code 2009 MAZDA
Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0021 Description Camshaft Position ‘A’ Timing Over-Advanced or System Performance Bank 2 is the generic definition for the P0021; however your vehicle’s manufacturer may have a different definition for