Possible causes
– Variable Tumble Control Solenoid (VTCS) vacuum solenoid stuck closed
– Faulty Variable Tumble Control Solenoid (VTCS)
– Variable Tumble Control Solenoid (VTCS) harness is open or shorted
– Variable Tumble Control Solenoid (VTCS) circuit poor electrical connection
– Faulty Variable Tumble Control Solenoid (VTCS)
– Variable Tumble Control Solenoid (VTCS) harness is open or shorted
– Variable Tumble Control Solenoid (VTCS) circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1512 MAZDA Description
Variable Tumble Control Solenoid (VTCS) Dual Plane Intake system