Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes – Faulty VIAS control solenoid valve– VIAS control solenoid valve circuit harness is open or shorted– VIAS control solenoid valve circuit poor electrical connection When is the code detected? The VIAS control solenoid valve cuts the intake manifold
Possible causes Harness or connectors (The solenoid valve circuit is open or shorted.) VIAS control solenoid valve When is the code detected? An excessively low or high voltage signal is sent to ECM through the valve Symptoms – Engine Light
P1800 BUICK – TCM Power Control Relay Circuit Open
P1800 CADILLAC – TCM Power Control Relay Circuit Open
P1800 HYUNDAI – Immobilizer Antenna Error