CEL P0546 after driving on the highway
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This is a discussion on CEL P0546 after driving on the highway within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; For reference: P0546 - Exhaust gas temperature sensor circuit high input i rarely drive on the highway..and by rarely i ...

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    CEL P0546 after driving on the highway

    For reference: P0546 - Exhaust gas temperature sensor circuit high input

    i rarely drive on the highway..and by rarely i mean very very rarely. the other day i drove to the beach and on the way there (after cruising for about 45 minutes or so in fifth at approx. 3000 rpm) the cel came on. i had it checked and cleared (P0546). it came back on on the way home. i have a 2003 wrx with catted tbe, uppipe, intake, mbc, and a protune via opensource. Any ideas as to what this means? I have driven on the highway only a few other times and each was for shorter (approx. 30 min.) periods at less rpms (~2500). thanks a lot!
    Last edited by 2litrerex; 06-10-2011 at 08:57 AM.

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    Good news, everyone! xxxxxxxAnub1s's Avatar
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    Have you replaced your uppipe yet?
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    yes

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    Registered User mudferret's Avatar
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    Could be tune related. Any way for you to accurately monitor AFR's?
    ...Rob.
    MMVI WRX - VF43 Airboy Tuned @ 3500'

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    Im afraid i don't...maybe i should finally invest in a tactrix cable

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