Circuit/System Verification
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Verify DTC P0721, P0722, P0723, P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 is not set.
- If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Perform the Line Pressure Check .
- Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
- Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
- Listed in the chart below are conditions for each component that could set DTC P0796 or P0797. Carefully inspect each component for that condition. Repair or replace as necessary.
| DTC | Component | Condition |
|---|---|---|
| P0796 P0797 |
Control Valve Body Upper Assembly (343) | Hybrid Low, 1-2 Clutch Regulator Valve (336) stuck - debris, sediment, binding or scored bore |
| P0796 | Control Valve Body Upper Assembly (343) | Valve Retaining Plug - Hybrid Low, 1-2 Clutch Regulator Valve, leaking, undersized bore plug, or damaged |
| P0796 P0797 |
Control Valve Channel Plate (304) | Control Valve Channel Plate damaged or contaminated with large debris |
| P0796 P0797 |
Control Solenoid Valve Assembly (307) | Clutch Pressure Control Solenoid 3:
|
| P0796 P0797 |
Control Solenoid Valve Assembly (307) | PSW1 Circuit opened or shorted to ground |
| P0796 P0797 |
hybrid low, 1-2 clutch assembly | Slipping or damage |