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311 OBD Code 200 1991

uid 27's pic
posted by  Art Benstein on  Sun May 31 16:20 CST 2015
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

"I was unable to get a 6 month old O2 sensor to read anyhing but 4 volts so I was wondering if I lost the ground through the exhaust"

That's pretty weird. I'd want to focus on that keeping in mind the possibility of operator error. I just can't picture that amount of rust in your neck of the woods. If it is bleed from the heater, disconnecting the heater wires (double plug) would change the reading.
--
Art Benstein near Baltimore

Don't find fault, find a remedy. (Henry Ford)






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