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Persistant coolant temp check engine light 200 1990

uid 18083's pic
posted by  lucid on  Sun Oct 3 13:07 CST 2010
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

"So there a ground associated with the sensor in the wiring that could be corroded and causing it to not ground sufficiently sometimes?"

No, your Coolant Temp Sensor does not use a discrete ground wire. Grounding is accomplished by the sensor body's contact with the tapped hole in the head.

If you have mistakenly used teflon tape or other thread sealant, I believe it could affect the grounding. There should be a copper sealing washer under the sensor head.

--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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