GM Service Manual Online
For 1990-2009 cars only

Diagnostic Trouble Code Identification

DTC

Description

DTC Type*

Default Action

P0218

Transmission Fluid Overtemperature

C

IDLE ENGINE TRANSMISSION HOT message displays

P0502

Vehicle Speed Sensor Circuit-Low Input

B

    • SERVICE ENGINE SOON, SPEED SENSOR FAULT displays
    • Default line pressure
    • Inhibit TCC
    •  Disable cruise control
    • Freeze upshift and steady state adapts
    • Calculate VSS from A/T ISS and commanded gear

P0503

Vehicle Speed Sensor Circuit-Intermittent

B

    • SERVICE ENGINE SOON, SPEED SENSOR FAULT displays
    • Default line pressure
    • Inhibit TCC
    • Disable cruise control
    • Freeze upshift and steady state adapts
    • Calculate VSS from A/T ISS and commanded gear

P0711

Transmission Fluid Temperature Sensor Circuit-Range/Performance

B

The PCM calculates a default transmission fluid temperature based on engine coolant temperature, intake air temperature and engine run time.

P0712

Transmission Fluid Temperature Sensor Circuit-Low Input

D

The PCM calculates a default transmission fluid temperature based on engine coolant temperature, intake air temperature and engine run time.

P0713

Transmission Fluid Temperature Sensor Circuit-High Input

D

The PCM calculates a default transmission fluid temperature based on engine coolant temperature, intake air temperature and engine run time.

P0716

Input Speed Sensor Circuit-Intermittent

B

    • SERVICE ENGINE SOON , SERVICE TRANSMISSION displays
    • Default line pressure
    • Inhibit TCC
    • Freeze upshift, steady state and garage shift adapts
    • Calculate A/T ISS from VSS and commanded gear

P0717

Input Speed Sensor Circuit--Low Input

B

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Default line pressure
    • Inhibit TCC
    •  Freeze upshift, steady state and garage shift adapts
    • Calculate A/T ISS from VSS and commanded gear

P0719

Brake Switch Circuit--Low Input

C

    • SERVICE ELECTRICAL SYSTEM displays
    • Freeze garage shift adapts
    • Extended travel or brake lamp switch is used by the PCM

P0724

Brake Switch Circuit--High Input

C

    • SERVICE ELECTRICAL SYSTEM displays
    • Freeze garage shift adapts
    • Extended travel or brake lamp switch is used by the PCM

P0730

Incorrect Gear Ratio

C

    • SERVICE TRANSMISSION displays
    • Maximum line pressure
    • Freeze upshift, steady state and garage shift adapts

P0741

Torque Converter Clutch System-Stuck OFF

B

    • SERVICE ENGINE SOON displays
    • Inhibit TCC
    • Inhibit 4th gear in Hot Mode

P0742

Torque Converter Clutch System-Stuck ON

B

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Inhibit TCC
    • Inhibit 4th gear in Hot Mode

P0748

Pressure Control Solenoid Circuit-Electrical

C

    • SERVICE TRANSMISSION displays
    • Maximum line pressure
    • Freeze upshift, steady state and garage shift adapts

P0751

1-2 Shift Solenoid Valve-Performance

A

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Default line pressure
    • Default to 2nd gear
    • Inhibit TCC
    • Freeze steady state and garage shift adapts

P0753

1-2 Shift Solenoid Circuit Electrical

A

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Default line pressure
    • Default to 2nd gear
    • Inhibit TCC
    • Freeze steady state and garage shift adapts

P0756

2-3 Shift Solenoid Valve-Performance

A

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Default line pressure
    • Default to 2nd gear
    • Inhibit TCC
    • Freeze steady state and garage shift adapts

P0758

2-3 Shift Solenoid Circuit Electrical

A

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Default line pressure
    • Default to 2nd gear
    • Inhibit TCC
    • Freeze steady state and garage shift adapts

P1810

Transmission Fluid Pressure Manual Valve Position Switch Assembly Circuit Malfunction

B

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Default line pressure
    • Inhibit TCC
    • Freeze steady state and garage shift adapts

P1811

Maximum Adapt and Long Shift

C

    • SERVICE TRANSMISSION displays
    • Maximum line pressure
    • Freeze upshift, steady state and garage shift adapts

P1814

Torque Converter Overstress

D

--

P1860

Torque Converter Clutch Pulse Width Modulation Solenoid Circuit Electrical

A

    • SERVICE ENGINE SOON, SERVICE TRANSMISSION displays
    • Inhibit TCC
    • Inhibit 4th gear in Hot mode

*DTC Types:

    • A-Emission-related, turns the MIL ON after the first failure.
    • B-Emission-related, turns the MIL ON after two consecutive trips with failure.
    • C-Non-emission-related, message displayed.
    • D-Non-emission-related, no lamps and no message.