Possible causes
– Faulty Vacuum Control Solenoid Valve
– Vacuum Control Solenoid Valve harness is open or shorted
– Vacuum Control Solenoid Valve circuit poor electrical connection
– Vacuum Control Solenoid Valve harness is open or shorted
– Vacuum Control Solenoid Valve circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)