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 that P0721, P0722, P0723, P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 is not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Perform the Transmission Fluid Level and Condition Check .
- 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 .
- If the shift solenoid 1 is found to be leaking or stuck OFF, replace the Q8 control solenoid valve assembly.
- If the Q8 control solenoid valve assembly tests normal, inspect the components and hydraulic circuits in the chart listed below for a leak or a stuck valve. Carefully inspect each component for that condition. Repair or replace as necessary.
DTC P0751
| DTC | Component | Condition |
|---|---|---|
| P0751 | Control Valve Body Upper Assembly (343) |
|
| P0751 | Control Solenoid Valve Assembly (307) | Control signal fluid supply leak - valve body filter plate assembly cracked or damaged gasket seal (307) |
| P0751 | Control Valve Channel Plate (304) | Control Valve Channel Plate damaged or contaminated with large debris |
| P0751 | Control Solenoid Valve Assembly (307) | Pressure Switch 3:
|
| P0751 | Control Solenoid Valve Assembly (307) | Pressure Switch 4:
|