Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (AUTOMATIC TRANSMISSION - AF40-6 (MDK))DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC CODE INDEX
2013 Buick Regal Turbo Premium, Standard Trans
Diagnostic Code Index
2013 Buick Regal Turbo Premium, Standard TransSECTION Diagnostic Code Index
WARNING: This page is about a different variant/trim than selected.
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| DTC P0218 | DTC P0218 Transmission Fluid Overtemperature |
| DTC P0502 or P0503 | DTC P0502 Vehicle Speed Sensor (VSS) Circuit Low Voltage DTC P0503 Vehicle Speed Sensor (VSS) Circuit Intermittent |
| DTC P057B-P057D | DTC P057B Brake Pedal Position Sensor Performance DTC P057C Brake Pedal Position Sensor Circuit Low Voltage DTC P057D Brake Pedal Position Sensor Circuit High Voltage |
| DTC P0601, P0602, P0603, or P0604 | DTC P0601 Control Module Read Only Memory Performance DTC P0602 Control Module Not Programmed DTC P0603 Control Module Long Term Memory Reset DTC P0604 Control Module Random Access Memory Performance |
| DTC P0657 | DTC P0657 Actuator High Control Circuit Group Malfunction |
| DTC P0705, P0707, or P0708 | DTC P0705 Transmission Range Switch Circuit DTC P0707 Park/Neutral Position Switch Circuit Low Voltage DTC P0708 Park/Neutral Position Switch Circuit High Voltage |
| DTC P0711-P0713 | DTC P0711 Transmission Fluid Temperature Sensor Performance DTC P0712 Transmission Fluid Temperature Sensor Circuit Low Voltage DTC P0713 Transmission Fluid Temperature Sensor Circuit High Voltage |
| DTC P0715 | DTC P0715 Input Speed Sensor Circuit |
| DTC P0717 | DTC P0717 Input Speed Sensor Circuit No Signal |
| DTC P0720 or P0722 | DTC P0720 Output Speed Sensor Circuit Performance DTC P0722 Output Speed Sensor Circuit No Signal |
| DTC P0729 | DTC P0729 6th Gear Ratio Incorrect |
| DTC P0731 | DTC P0731 1st Gear Ratio Incorrect |
| DTC P0732 | DTC P0732 2nd Gear Ratio Incorrect |
| DTC P0733 | DTC P0733 3rd Gear Ratio Incorrect |
| DTC P0734 | DTC P0734 4th Gear Ratio Incorrect |
| DTC P0735 | DTC P0735 5th Gear Ratio Incorrect |
| DTC P0741 or P0742 | DTC P0741 Torque Converter Clutch (TCC) System Stuck Off DTC P0742 Torque Converter Clutch (TCC) System Stuck On |
| DTC P0748, P0962, or P0963 | DTC P0748 Line Pressure Control Solenoid Valve System Performance DTC P0962 Line Pressure Control Solenoid Valve Control Circuit Low Voltage DTC P0963 Line Pressure Control Solenoid Valve Control Circuit High Voltage |
| DTC P0778 or P0965-P0967 | DTC P0778 Pressure Control Solenoid Valve 1 System Performance DTC P0965 Pressure Control Solenoid Valve 1 System Performance DTC P0966 Pressure Control Solenoid Valve 1 Control Circuit Low Voltage DTC P0967 Pressure Control Solenoid Valve 1 Control Circuit High Voltage |
| DTC P0798, P0970, or P0971 | DTC P0798 Pressure Control Solenoid Valve 2 System Performance DTC P0970 Pressure Control Solenoid Valve 2 Control Circuit Low Voltage DTC P0971 Pressure Control Solenoid Valve 2 Control Circuit High Voltage |
| DTC P07A2 | DTC P07A2 Transmission Clutch 1 Performance |
| DTC P081A or P081B | DTC P081A Brake Transmission Shift Interlock Solenoid Actuator - Short to Ground/Open DTC P081B Brake Transmission Shift Interlock Solenoid Actuator - Short to Voltage |
| DTC P0851 or P0852 | DTC P0851 Park/Neutral Position (PNP) Switch Circuit Low Voltage DTC P0852 Park/Neutral Position (PNP) Switch Circuit High Voltage |
| DTC P0868 or P0869 | DTC P0868 Transmission Fluid Low Pressure - Malfunction DTC P0869 Transmission Fluid High Pressure - Malfunction |
| DTC P0973 or P0974 | DTC P0973 Shift Solenoid Valve 1 Control Circuit Low Voltage DTC P0974 Shift Solenoid Valve 1 Control Circuit High Voltage |
| DTC P0976 or P0977 | DTC P0976 Shift Solenoid Valve 2 Control Circuit Low Voltage DTC P0977 Shift Solenoid Valve 2 Control Circuit High Voltage |
| DTC P1731 | DTC P1731 1st Gear Ratio Incorrect - with Engine Brake |
| DTC P2544 | DTC P2544 Transmission Torque Request Signal Message Counter Incorrect |
| DTC P2716 or P2719-P2721 | DTC P2716 Pressure Control Solenoid Valve 3 System Performance DTC P2719 Pressure Control Solenoid Valve 3 System Performance DTC P2720 Pressure Control Solenoid Valve 3 Control Circuit Low Voltage DTC P2721 Pressure Control Solenoid Valve 3 Control Circuit High Voltage |
| DTC P2727, P2729, or P2730 | DTC P2727 Brake Band Pressure Control Solenoid Valve Control Circuit Shorted DTC P2729 Brake Band Pressure Control Solenoid Valve Control Circuit Low Voltage DTC P2730 Brake Band Pressure Control Solenoid Valve Control Circuit High Voltage |
| DTC P2761, P2763, or P2764 | DTC P2761 Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Performance DTC P2763 Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit High Voltage DTC P2764 Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit Low Voltage |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.