o2 sensor prob
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Junior Member
Joined: Dec 2004
Posts: 8
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From: Ottawa, canada
o2 sensor prob
So I got the codes P0138 and P0136 off my Obd2 scanner once the check engine came on. 1 of the 2 O2 sensors are faulty. Getting better mileage out of it. Should I change 1 or both O2 sensors? Do I risk clogging the Cat if I don't?