Possible causes – Dirty engine oil– Low engine oil level– Faulty intake valve control solenoid– Intake valve control solenoid harness is open or shorted– Intake valve control solenoid circuit poor electrical connection When is the code detected? ECM monitors OCV
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– 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– Incorrect timing– Engine mechanical problems– Faulty actuator Symptoms – Engine Light ON (or Service Engine Soon Warning Light)
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)
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 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 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 engine oil– Low engine oil level– Timing belt misaligned– Faulty AVCS solenoid Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Lack/Loss of power– Engine noise– Engine rough idle
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause
Possible causes – Dirty Fuel Injector 1– Faulty Fuel Injector 1– Plugged Fuel Injector 1– Fuel injector 1 harness is open or shorted– Fuel injector 1 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause