Diagnostic Fault Information

WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0741 will set with a hydraulic/mechanical condition.
DTC P2817 will set with a hydraulic/mechanical condition.
DTC P2818 will set with a hydraulic/mechanical condition or high resistance in the circuit of the component Q77H without setting component/control circuit DTCs.
The components are listed from the least to the most intrusive to service.
Verify the conditions listed in the table do not exist

Component	DTC	Condition
Control Valve Solenoid Body Q77H Transmission Control Solenoid Valve 8	P0741, P2817, P2818	Binding, sticking or stuck component: Solenoid Valve Blocked or restricted component: Fluid/oil passage Damaged or missing component: Bore Retaining Clip Solenoid Valve Spring Valve
Torque Converter Assembly Torque Converter Clutch	P0741, P2817, P2818	Blocked or restricted component: Fluid/oil passage Damaged or worn component: Friction Plate Leaking component: Fluid/oil passage
Automatic Transmission Fluid Pump Assembly Torque Converter Clutch Blowoff Ball Valve Torque Converter Clutch Blowoff Ball Valve Retainer Torque Converter Clutch Blowoff Ball Valve Spring Torque Converter Clutch Control Valve Torque Converter Clutch Regulator Apply Valve Valve Body Bore Valve Spring	P0741, P2817, P2818	Binding, sticking or stuck component: Valve Debris on the component. Damaged or missing component: Bore Retaining Clip Spring Valve

Component

DTC

Condition

Control Valve Solenoid Body

Q77H Transmission Control Solenoid Valve 8

P0741, P2817, P2818

Binding, sticking or stuck component: Solenoid Valve
Blocked or restricted component: Fluid/oil passage
Damaged or missing component:
- Bore
- Retaining Clip
- Solenoid Valve
- Spring
- Valve

Torque Converter Assembly

Torque Converter Clutch

P0741, P2817, P2818

Blocked or restricted component: Fluid/oil passage
Damaged or worn component: Friction Plate
Leaking component: Fluid/oil passage

Automatic Transmission Fluid Pump Assembly

Torque Converter Clutch Blowoff Ball Valve
Torque Converter Clutch Blowoff Ball Valve Retainer
Torque Converter Clutch Blowoff Ball Valve Spring
Torque Converter Clutch Control Valve
Torque Converter Clutch Regulator Apply Valve
Valve Body Bore
Valve Spring

P0741, P2817, P2818

Binding, sticking or stuck component: Valve
Debris on the component.
Damaged or missing component:
- Bore
- Retaining Clip
- Spring
- Valve