DTC P0796 or P0797
Diagnostic Instructions
DTC Descriptors
DTC P0796: Pressure Control Solenoid 3 - Stuck Off
DTC P0797: Pressure Control Solenoid 3 - Stuck On
Circuit/System Description
The clutch pressure control solenoid 3 is part of the control solenoid valve assembly and is not serviced separately. The transmission control module (TCM) supplies 12 volts to the clutch pressure control solenoid 3 on the high side driver 1 circuit. The TCM controls the pressure control solenoid 3 through the clutch pressure control solenoid 3 control circuit. The normally high clutch pressure control solenoid 3 controls fluid to the following components:
• | Variable low 1-2 reverse clutch |
Conditions for Running the DTC
P0796 or P0797
• | Shift solenoid valve 1 is not in a transition state. |
• | The transmission line pressure is greater than 325 kPa (47 psi). |
P0796
The clutch pressure control solenoid 3 commanded pressure is greater than 1800 kPa (261 psi) for up to 5 seconds depending on transmission temperature.
P0797
The clutch pressure control solenoid 3 commanded pressure is less than 5 kPa (1 psi) for up to 5 seconds depending on transmission temperature.
Conditions for Setting the DTC
P0796 - Condition 1
The clutch pressure control solenoid 3 commanded pressure is 1800 kPa (261 psi) and the transmission fluid pressure switch state is Low for 30 seconds.
P0796 - Condition 2
The clutch pressure control solenoid 3 commanded pressure is 1800 kPa (261 psi) and the transmission fluid pressure switch 5 state is Low for seconds greater than 5 times during a key cycle.
P0797 - Condition 1
The clutch pressure control solenoid 3 commanded pressure is 5 kPa (1 psi) and the transmission fluid pressure switch 5 state is High for 30 seconds.
P0797 - Condition 2
The clutch pressure control solenoid 3 commanded pressure is 5 kPa (1 psi) and the transmission fluid pressure switch 5 state is High for 2 seconds greater than 5 times during a key cycle.
Action Taken When the DTC Sets
• | DTC P0796 is a Type B and DTC P0797 is a Type A DTC. |
• | The TCM commands 450 kPa (65 psi) line pressure. |
• | The TCM freezes transmission adaptive functions. |
Conditions for Clearing the DTC
DTC P0796 is a Type B and DTC P0797 is a Type A DTC.
Diagnostic Aids
When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information.
Special Tools
DT-47825 Control Solenoid Test Plate Kit
Circuit/System Verification
- Verify that DTCs P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 are not set.
- 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 .
- Inspect the control valve body assembly for sticking valves, damage, scored bores, or debris. Refer to Control Valve Body Diagnostic Inspection .
⇒ | If there is cause for concern in the valve body, repair or replace the valve body as necessary. |
- Verify no DTCs P079A or P07A3 after repair.
Component Testing
- Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
- Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for Control Solenoid Valve Assembly and Transmission Control Module Assembly replacement, programming, and setup. |
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