GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0711:  Transmission Fluid Temperature (TFT) Sensor Performance

DTC P0712:  Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

DTC P0713:  Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Circuit/System Description

The transmission fluid temperature (TFT) sensor is located inside of the transmission control module (TCM) assembly and is not serviced separately. The TFT sensor provides transmission fluid temperature to the TCM. This fault is handled inside the TCM and no external circuits are involved.

Conditions for Running the DTC

P0711

    • The engine speed is greater than 450 RPM.
    • No DTCs P0711, P0716, P0717, P0722, or P0723.
    • DTC P0711 not passed this key ON.
    • The TCM temperature sensor is between -39 and +149°C (-38 and +300°F).

P0712

    • The engine speed is greater than 450 RPM.
    • DTC P0712 is not failed this ignition cycle.

P0713

    • The engine speed is greater than 450 RPM.
    • The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
    • The torque converter clutch (TCC) slip speed is equal to or greater than 120 RPM for 200 seconds or greater.
    • DTC P0713 is not failed this ignition cycle.

Conditions for Setting the DTC

P0711 Fail Case 1

    • Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
    • TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
    • The TFT is between -40 and +21°C (-40 and +70°F).
    • The TFT has changed by less than 2.0°C (3.6°F) in 100 seconds.
    • The engine coolant temperature (ECT) is greater than 70°C (158°F).
    • The ECT has increased by 55°C (99°F) since start-up.

P0711 Fail Case 2

    • Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
    • TCC slip speed is greater than 120 RPM for 300 seconds cumulative.
    • The TFT is between 120-150°C (248-302°F).
    • The TFT has changes by less than 2.0°C (3.6°F) in 100 seconds.
    • The ECT is greater than 70°C (158°F).
    • The ECT has increased by 55°C (99°F) since start-up.

P0711 Fail Case 3

The TCM power up temperature changes by greater than or equal to 20°C (36°F) 14 times over 7 seconds.

P0712

The TCM power up temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

P0713

The TFT is less than or equal to -80°C (-112°F) for greater than 25 seconds.

Action Taken When the DTC Sets

    • DTCs P0711, P0712, and P0713 are Type C DTCs.
    • The TCM freezes transmission adaptive functions.
    • The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTCs P0711, P0712, and P0713 are Type C DTCs.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing.
    •  Connector Repairs.
    •  Testing for Intermittent Conditions and Poor Connections.
    •  Wiring Repairs.

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

  1. Start the engine and operate the vehicle at 64 km/h (40 mph) while observing the TCM start up temperature sensor and the TFT sensor.
  2. The system is operating normally if the TCM start up temperature is within 10°C (18°F) of the TFT temperature.

Circuit/System Testing

  1. Clear the DTC and operate the vehicle under the conditions for running and setting the DTC. Verify that the DTC does not reset.
  2. If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References for replacement, setup, and programming.