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bin

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  • Toyota Model*
    avalon 99

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    PO135 code

    My avalon 99 check engine light came on a month ago, free check at autozone tells me the code P0135(B1S1). I know autozone sometimes gives wrong information. my previous Corolla also get bad O2 sensor code from autozone although actually the bad is at muffler. I checked freely at Cottman again, confirmed P0135. I ordered a sensor from houston toyota dealer at $144, followed the instruction from autozone and Haynes book, changed O2 sensor at front between the engine and rediator. I cancel the code. But after I drived 10 miles the light comes again. Check gives the same code P0135. Then I pull out the rear sensor (between the engine and firewall, underneath, hard to access) , and check the resistance, it gives me 2~3 MOhm (should be 11~19 Ohm). Most books confused me, I got totally lost at which is the Bank1 sensor 1. Now it's clear, B1S1 is rear one, which is hard to change. Then I unplug the blue 15 Ohm fuse in the biggest block in the compartment to clear the error code. Finally, I fixed the P0135.
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