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Question: Got receipt saying secondary h02s12 (heated oxygen sensor-bank1 sensor2) anyfix?

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Manuel123, 1.7L 4 Cylinder, Denville, NJ, February 26, 2013, 16:40
 Rookie

Probable causes listed were
A/F ratio concern
Blocked exhaust
Faulty H02s12(bank 1 sensor 2)

Any suggestions on what its more likely to be and how to fix?

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  • Answer #1

    bmdouble February 27, 2013, 07:22
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     Journeyman

    The code definition sounds pretty vague.If it is a circuit code than it could be several things.And if it were an air fuel ratio lean or rich code than you need to diagnose further for a root cause.I have never replaced an o2 sensor for a lean or rich code,but auto parts stores ALWAYS sell customers on o2 sensors when they get these codes.Get us the actual code # and we'll help.

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