DTC P1570: Variable Tumble Control System (VTCS) Solenoid Valve Circuit, High Input: Condition

DTC is set when Powertrain Control Module (PCM) detects high voltage from VICS solenoid valve with VICS solenoid valve on. This is a continuous monitor. MIL is illuminated when Powertrain Control Module (PCM) detects malfunction during two consecutive drive cycles. Possible causes are:

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