For 1990-2009 cars

### 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 percent.

### 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

• | Electrical Center Identification Views

• | Component Connector End Views

• | Splice Pack Connector End Views

• | Inline Harness 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

• | Diagnostic Trouble Code (DTC) List - Vehicle

#### Scan Tool Reference

Control Module References for scan information.

### 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.