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1997 Lincoln Mark VIII Base 2dr Coupe

1997 Lincoln Mark VIII
Trim Info:
Rear Wheel Drive, 2 Door Coupe, Mid-Size
18 mpg city / 26 mpg hwy
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September 19, 2011, 2:24 pm

Stephen S

Question: Intermittent service engine light

After driving at highway speeds for 45 minutes, car has SES light come on for 15 seconds and then goes out. After another 5-10 miles or when climbing a hill, SES comes on for 5-15 seconds, then goes out. This car does not have memory in its OBD-I. Any thoughts on what is causing? Have just tuned with new plugs, wires, fuel filter, etc. THE SES light was intermittent before tuneup, also. Thanks, SS

September 20, 2011, 10:17 pm

Richard W
Expert Mechanic

You should have codes in the computer. But if the light at 45 mph I would say you have a egr problem.

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September 21, 2011, 3:29 am

Stephen S

Thank you very much. Ford service manager stated that due to my car being 1994 Lincoln, "there is no memory to read the codes due to its year and OBD I." The SES light must be on and burning in order for this dealer to read the codes. Is this valid or do I need to seek a better mechanic?

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