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 MANUALSBUICK1995REGAL GRAN SPORTREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSDIAGNOSIS - 4T60-E
1995 Buick Regal Gran Sport
Diagnosis - 4T60-E
1995 Buick Regal Gran SportSECTION Diagnosis - 4T60-E
- Application
- Description
- Operation
- Trouble Shooting
- Electronic Self-Diagnostics (Except CADILLAC)
- Diagnostic Charts (Except CADILLAC)
- Diagnostic Charts
- Code 21, Throttle Position Sensor Signal Voltage High - 2.3L "N" Body
- Code 22: Throttle Position Sensor Signal Voltage Low - 2.3L "N" Body
- Code 24: Vehicle Speed Sensor - 2.3L "N" Body
- Code 27: Quad-Driver No. 1 Error - 2.3L "N" Body
- Code 29: Quad-Driver 3 - 2.3L "N" Body
- Code 53: System Voltage High - 2.3L "N" Body
- Code P0122: Throttle Position Sensor Signal Voltage Low - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0122: Throttle Position Sensor Signal Voltage Low - 3.8L "U" Body
- Code P0123: Throttle Position Sensor Signal Voltage High - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0123: Throttle Position Sensor Signal Voltage High - 3.8L "U" Body
- Codes P0501/P0502: VSS Circuit - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Codes P0501/P0502: VSS Circuit - 3.8L "U" Body
- Code P0703: TCC Brake Switch Input - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0703: TCC Brake Switch Input - 3.8L "U" Body
- Code P0705: Transaxle Range Switch - 3.1L "A" Body, 3.4L "W" Body
- Code P0705: Transaxle Range Switch - 3.8L "C", "G", "H" & "W" Bodies
- Code P0705: Transaxle Range Switch - 3.8L "U" Body
- Code P0712: Transaxle Temp. Sensor Low Temperature Indicated - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0712: Transaxle Temperature Sensor Signal Voltage Low - 3.8L "U" Body
- Code P0713: Transaxle Temp. Sensor High Temperature Indicated - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0713: Transaxle Temperature Sensor Signal Voltage High - 3.8L "U" Body
- Code P0740: Torque Converter Clutch - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0740: Torque Converter Clutch - 3.8L "U" Body
- Code P0755: Trans. Shift Solenoid "B" - 3.1L "A" Body, 3.4L "W" Body & 3.8L "C", "G", "H" & "W" Bodies
- Code P0755: Transaxle Shift Solenoid "B" - 3.8L "U" Body
- Code P1550: Cruise Stepper Motor - 3.1L "A" Body
- Code P1550: Cruise Stepper Motor - 3.4L "W" Body
- Code P1550: Cruise Stepper Motor - 3.8L "W" Body
- Code P1640: QDM "A" Circuit - 3.1L "A" Body
- Code P1640: QDM "A" Error - 3.4L "W" Body
- Code P1640: QDM No. 1 Circuit - 3.8L "C", "G", "H" & "W" Bodies
- Code P1640: QDM No. 1 Circuit - 3.8L "U" Body
- Code P1650: QDM "B" Circuit - 3.1L "A" Body
- Code P1650: QDM "B" Error - 3.4L "W" Body
- Code P1650: QDM No. 2 Circuit - 3.8L "C", "G", "H" & "W" Bodies
- Code P1650: QDM No. 2 Circuit - 3.8L "U" Body
- Electronic Self-Diagnostics (CADILLAC)
- Diagnostic Charts (CADILLAC)
- Diagnostic Charts
- Code P016: Generator Voltage Out Of Range *** Lo
- Code P021: Shorted Throttle Position (TP) Sensor
- Code P022: Open Throttle Position (TP) Sensor
- Code P024: Vehicle Speed Sensor (VSS) Circuit Problem
- Code P039: Torque Converter Clutch (TCC) Engagement Problem
- Code P057: Shorted Transaxle Temperature Sensor Circuit
- Code P059: Open Transaxle Temperature Sensor Circuit
- Code P070: Intermittent Throttle Position (TP) Sensor
- Code P075: Vehicle Speed Sensor Signal Interrupt
- Code P090: TCC Brake Switch Input Circuit Problem
- Code P091: Transaxle Range Switch Problem
- Code P096: Torque Converter Overstress
- Electronic Testing
- Wiring Diagrams
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.