Circuit/System Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Verify the conditions listed below do not exist. Carefully inspect each component for that condition. Repair or replace as necessary.

P2808 or P2809 - Control Valve Solenoid Body

Transmission Control Solenoid Valve 7 stuck/sticking-debris, binding, damage valve.

P2808 or P2809 - Control Valve Solenoid Body

TCC Control Valve stuck/sticking-debris, binding damage valve.

P2808 or P2809 - Control Valve Upper Body Assembly

TCC regulator valve stuck/sticking - debris, binding, damage valve, scored bore.
Converter control valve stuck/sticking - debris, binding, damage valve, scored bore.

P2808 or P2809 - Torque Converter Assembly

Torque Converter clutch piston seals missing or damaged.

P2808 or P2809 - Torque Converter

Fluid circuit - plugged with debris, or leaks due to missing or damage O-rings, seals, or gaskets.