Thread: Need help with a code?

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  1. #1 Need help with a code? 
    SE Level Member FRESCOLIO's Avatar
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    Sup Fallas? Its been a while. Been busy. I diagnosed a check engine light on my app and found 2 codes. One is Po455 the other is P0455 mod$10. I know they are both evap emision control system leak codes but what part that needs replacing I don't. Im guessing its the converter or o2 sensors thats casuing the light to be on, but I'm not sure. I got a emmission test in the mai;l so maybe I could take it in and gett some info on the exact part needing replacement. Any help will be appreciated.
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  2. #2 Re: Need help with a code? 
    GT Level Member djrepoman's Avatar
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    Front O2 sensor is bad. Stay away from the Bosch one when you replace it
    2000 GT ,E85 powered, and still slow

    98 GTP Stock
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  3. #3 Re: Need help with a code? 
    SE Level Member powerranger262's Avatar
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    Napa has NGK or Denso. Any thoughts on them? What is a good brand to put back in?
    2004 Grand Prix GT 3.8L
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  4. #4 Re: Need help with a code? 
    The Blue One blueguy's Avatar
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    Denso one...hands down.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
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  5. #5 Re: Need help with a code? 
    SE Level Member fst4dr's Avatar
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    P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

    This relates to an o2 sensor how?

    This could be something as simple as you started your car with the gas cap off or didn't tighten it down all the way when you were fueling last. It could also be the seal on the cap is bad or... It could be a large crack or hole in the fuel tank/evap system
    Last edited by fst4dr; 02-13-2011 at 11:37 AM.
    1998 4dr GTP Bright Red
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