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Old 10-10-2001, 04:36 PM
sbourg sbourg is offline
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
Fact is, it should be pretty easy for a tech with the proper tools to distinguish whether the problem is or not the O2 sensor. If the connector to the O2 sensor is unplugged and the running characteristic does not change, the ECU may be bad - unless the O2 sensor failed 'open'. An 'open' symptom you would expect to trigger a code for a bad O2 sensor. If the running does change, and a code is set when you unplug the O2 sensor, then it may be bad and replacing it would be a worthwhile diagnostic.

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