FixVault

Home › Mazda › 2002 › MX-5 Miata Base, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P1570: Variable Tumble Control System Solenoid Valve Circuit, High Input › Possible Cause

Possible Cause

Open or Short circuit between VTCS solenoid valve and PCM.
Open circuit between VTCS solenoid valve and main relay.
VTCS solenoid valve malfunction.
PCM malfunction.