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Guest
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94 325i with single o2 sensor. Replaced sensor and reset the computer, after a few minutes of running rough it ran great again. 800 miles later it started running rough again. Exchanged the old sensor for a new one and started running smooth again. 1000 miles later same problem. Don't think I can exchange it a third time. Why is it going out so quickly? Each time I have been getting the 1221 code.
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07-03-2013, 05:45 AM
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Moderator
Join Date: Jul 2012
Location: New England
Posts: 3,189
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You could have an issue with sensor contamination. Check that there is no oil or coolant leaking into your exhaust system, ruining the oxygen sensor.
- Nick |
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07-03-2013, 05:45 AM
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