Check Engine light Code PO128
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This is a discussion on Check Engine light Code PO128 within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I recently bought and installed a new Grimmspeed low temp thermostat and a CRXRacing radiator after my stock radiator cracked ...

  1. #1
    Registered User SubaruDewed's Avatar
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    Red face Check Engine light Code PO128

    I recently bought and installed a new Grimmspeed low temp thermostat and a CRXRacing radiator after my stock radiator cracked Now i keep getting the above code, PO128. Which from what i hear says its a cooling system or thermostat problem. Is there anyway that the new lower temp thermostat is making my engine throw this code? any suggestions would help.

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    He simply abides. SD_GR's Avatar
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    No luck with the PDF attached?

    New Lower Temp Thermostat Mod.

    OK, I'd contact Grimmspeed and ask their opinion at this point.
    WRX Info Links, Courtesy TheJ
    Man is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis Zorbas
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  4. #3
    Registered User SubaruDewed's Avatar
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    The PDF helped. I looked over all the points it said and all was clear. I have a code reader and can clear the code from the engine. When i do this it stays off for weeks if not months at a time...but eventually the code still comes back up.

  5. #4
    He simply abides. SD_GR's Avatar
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    Wow. I admit I am baffled. Sorry but I am out of ideas.
    WRX Info Links, Courtesy TheJ
    Man is a brute.... If you're cruel to him, he respects and fears you. If you're kind to him, he plucks your eyes out. Alexis Zorbas
    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
    DISCLAIMER: Opinions expressed are the author's alone and are inherently worthless.

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