Carry out On-Board Diagnostics

WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If equipped, turn the power take-off (PTO) unit off to make sure test results are correct. For a description of PTO operation, refer to Power Take-Off (PTO) . On-Board Diagnostic is not accessible when the PTO is in operation.

After a road test, with the vehicle warm and before disconnecting any connectors, carry out the Quick Test using the diagnostic tool. Refer to the INTRODUCTION article in ENGINE PERFORMANCE.