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CEL Code

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Old 02-18-2013, 04:07 PM
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Default CEL Code

I recently got CEL while driving back home the other day. The two codes I pull was :

P0138 oxygen sensor circuit

P0136 oxygen sensor circuit bank 1

I reset the ECU and it the CEL hasn't come back on. I've driven 500 miles already , but I'm getting horrible Gas mileage. Could my o2 sensor gone bad, that I'm getting horrible gas mileage ??
Forgot to add that I have a test pipe,exhaust & headers. Thank you
Old 02-19-2013, 10:35 AM
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Please help.... I don't want to buy a O2 sensor , unless I have to . Is there anyway to check if the sensor is bad?
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