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Clearing a Check Eng Light and a couple other questions 700 1992

posted by  Chris Mullet on  Sun Jul 11 07:14 CST 2010
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last visit: Fri Oct 24 09:08 CST 2014
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1992 745 8v NA Regina 100,000+ ? miles

My thermostat stuck and I overheated the engine. CEL illuminated. Replaced the thermostat and all appears OK with the engine. Got 2-2-4 "Eng Temp Sensor" faulty" out of the OBD which makes sense when the temp swings too high. I cleared the 2-2-4 (only code displayed) but the CEL is still on.

Do I have to disconnect the battery? I don't want to lose my radio presets.

Will the CEL self-extinguish down the road if all is good?.

Having driven two 740's over 16 years, this is the first CEL I'm encountered.

Also, this car has anti-lock brakes and there is a second OBD box labelled "B" next to the familiar box which they labelled "A". Box "B" has only one socket with a contact inserted. I'm guessing this is for the anti-lock brakes?? There is no probe on box "B" to retrieve codes - is there a unique reader that needs to be used?

Thanks again.








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Check Eng Light Self Cleared 700 1992

posted by  Chris Mullet on  Sun Jul 11 08:06 CST 2010
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last visit: Fri Oct 24 09:08 CST 2014
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CEL was off the next time I started the engine. Test drive good. Time for beer and soccer.







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