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Discussion Starter #1
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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Discussion Starter #3
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.
 
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