Uhm, I'm a bit confused, I don't want to replace something that doesn't need to be replaced and end up wasting more money.
If it's the o2 sensor thats messed up I don't mind replacing it I just want to know that it's the o2 sensor first.
I've done some research on google / forums etc.
People say it could be the MAF that needs to be cleaned?
also something about an o2S Simulator?
CODES
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Rear O2S, Bank 1 Minimum Voltage Monitoring
P0138
Rear O2S, Bank 1 Maximum Voltage Monitoring
P0139
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Anyone have any ideas?
If i replace the rear o2S will the CEL go away?
Thanks.
