There is a diagnostic procedure in the factory service repair manual for engine light lit ,no codes . Did you take it to ford dealer ? MIL - is referring to check engine , service engine soon etc...
- MIL always on when engine is running (no DTCs):
- MIL circuits
- For Focus, Mustang, Town Car, Continental, LS6/LS8, Escape, Windstar, F-150, Expedition and Navigator/Blackwood:
- Instrument Cluster, Section 413-01 of the Workshop Manual.
- All Others:
- GO to NB1
SERVICE ENGINE SOON indicator
After the engine is started, the SERVICE ENGINE SOON indicator will prove out for a duration of three seconds. If the instrument cluster does not receive a message from the PCM within five seconds, the instrument cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).
- An indicator is inoperative/always on - SERVICE ENGINE SOON
- Circuitry.
- Bulb.
- Instrument cluster.
- PCM.
PINPOINT TEST P: AN INDICATOR IS INOPERATIVE/ALWAYS ON - SERVICE ENGINE SOON
CONDITIONS
DETAILS/RESULTS/ACTIONS
P1 CARRY OUT THE INSTRUMENT CLUSTER SERVICE ENGINE SOON INDICATOR ACTIVE COMMAND
Trigger the HEC active command MIL.
- Did the SERVICE ENGINE SOON indicator illuminate?
Yes REFER to Powertrain Control/Emissions Diagnosis (PC/ED) manual.
No INSTALL a new instrument cluster; REFER to Instrument Cluster . CLEAR the DTCs. REPEAT the self-test.
My service engine light is on. I have a 96 Tracker. Serviced the engine (oil, filter and lube) that did not solve the problem. It cannot pass smog inspection with this light on.
My boyfriend ran a diagnostics test on Roger, my car's name :), and the EGR popped up on the screen. We got a new EGR valve and cleared out the Service Engine Soon light. I drove it for about a mile and the light came back on. My car runs fine, still good pick-up, no funny noises. I can't complain, but I have read that it could be an oxygen sensor or any sensor for that matter. As long as your car doesn't sound bad or run funny, I think all is fine.
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