Confirmation Procedure

1. Start the engine.

2. Hold the engine speed at 3,000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

3. Test-drive the vehicle under these conditions:

• HDS [ECT Sensor 1] above 158°F (70°C)
• Transmission in D
• Drive at a steady speed between 55 - 75 mph (90 - 120 km/h) for 1 minute, then decelerate (with throttle fully closed) for 10 seconds or more

4. Monitor the HDS [OBD STATUS (PGM-FI)] for DTC P0139.