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Have Code 4-3-6 : Which O2 Might Be Bad??? 850

posted by  someone claiming to be GMT on  Tue Sep 2 08:36 CST 2003 [RELATED]

For the second time in a week, my Engine Checnk Light went on and I have received code 4-3-6 on my '95 Volvo 850R with 33,540 miles. I reset it, but the Engine Check Light came on again after a day. The only indications I have are the Engine Check Light. The car seems to run great. According to Bay 13 Diagnostics, this code represents a malfunction in the referencing O2 sensor (rear). Since it probably costs quite a bit, is there anything I should do before going out to buy a new rear sensor?

I should also mention that the Engine Check Light came on about a month ago and when I tried to reset it, I needed to first go to A1 (Transmission) and reset a 4-1-6 code. Afterwards, I reset A2 according to Bay 13 and all was well...for awhile.

Please Help!
GMT






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New Have Code 4-3-6 : Which O2 Might Be Bad??? [850]
posted by  someone claiming to be GMT  on Tue Sep 2 08:36 CST 2003 >


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