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 P0897: Transmission Fluid Life

Circuit/System Description

Transmission fluid life is determined by monitoring transmission fluid temperature over a period of time. The transmission control module (TCM) calculates transmission fluid life based on a set of temperature ranges stored in TCM memory.

Conditions for Running the DTC

No TFT DTC P0712

Conditions for Setting the DTC

The calculated transmission oil life remaining is less than 10%.

Action Taken When the DTC Sets

DTC P0897 is a Type C DTC

Conditions for Clearing the DTC

DTC P0897 is a Type C DTC

Diagnostic Aids

    • Improper transmission cooling system may cause transmission fluid to age rapidly.
    • A malfunctioning TFT sensor may cause transmission fluid to age rapidly.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

    •  Automatic Transmission Inline Harness Connector End View
    •  Automatic Transmission Internal Connector End Views
    •  Automatic Transmission Related Connector End Views

Electrical Information Reference

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

DTC Type Reference

    •  Diagnostic Trouble Code (DTC) Type Definitions
    •  Diagnostic Trouble Code (DTC) List/Type

Scan Tool Reference

    •  Scan Tool Output Controls
    •  Scan Tool Data List
    •  Scan Tool Data Definitions

Circuit/System Verification

Observe the DTC information with the scan tool. Verify that the DTC is not set.

If DTC P0897 is set
    • Perform the Transmission Fluid Replacement procedure
    • Using a scan tool, reset the transmission oil life

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.