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Diagnostic Error Codes 2-3-1 and 1-1-3 700 1989

posted by  Herb Goltz on  Thu Sep 1 11:25 CST 2016
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last visit: Fri Oct 24 13:23 CST 2014
[RELATED]

I had this combination of codes with a '92 245 I used to own. In my case the O2 sensor (which was a new generic Bosch) was defective. I was measuring 1.3 VDC on the sensor output with the car warmed up, which is well beyond the operating output of an oxygen sensor (0.15-0.85 VDC). My suspicion at at the time was that the heater circuit voltage was bleeding over into the sensor circuit, but I couldn't actually confirm that. Replacing the sensor fixed the problem, and the car ran properly afterward.

Measure your sensor output and report back!

Good luck!






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