DTC P1569: Variable Tumble Control System (VTCS) Solenoid Valve Circuit, Low Input: Condition

DTC is set when PCM detects low voltage input at terminal No. 19 with VTCS solenoid valve off and ignition on. Possible causes are:

• VTCS solenoid valve malfunction.
• Poor connection at VTCS solenoid valve and PCM connectors.
• Open or short circuit between terminal No. 19 on Powertrain Control Module (PCM) and terminal "B" on VTCS solenoid valve.
• Open circuit between terminal "D" on main relay and terminal "A" on VTCS solenoid valve.