Diagnostic Strategy: 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.
- Vehicles that have power take-off capability will not have on board diagnostic capability when the power take off is in operation.
- Carry out on-board diagnostic procedures key on/engine off (KOEO) and key on/engine running (KOER).
- Record all diagnostic trouble codes (DTCs).
- Repair all non-transmission codes first.
- Repair all transmission codes second.
- Erase all continuous codes and attempt to repeat them.
- Repair all continuous codes which reappear.
- If only pass codes are obtained, refer to DIAGNOSIS BY SYMPTOM for further information and diagnosis.
Follow the diagnostic sequence to diagnose and repair the concern the first time.