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Carry out On-Board Diagnostics

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 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 TRANSMISSION ELECTRONIC CONTROL SYSTEM . 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 scan tool. See INTRODUCTION - GASOLINE article or INTRODUCTION -- 6.0L DIESEL article for diagnosis and testing of the PCM.