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Home >> Cadillac >> 2017 >> CTS V >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Automatic Transmission - 8L45 (M5N) Or 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2817 or P2818: Transmission Control Solenoid Valve 8 Stuck >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the conditions listed below do not exist. Carefully inspect each component for that condition. Repair or replace as necessary.

P2817 or P2818 - Control Valve Solenoid Body 

Transmission Control Solenoid Valve 8 stuck/sticking-debris, binding, damage valve.

P2817 or P2818 - Control Valve Upper Body 

Default valve stuck/sticking - debris, binding, damage valve, scored bore.

P2817 or P2818 - Default Valve 

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

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