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codes p0449 p0452

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  • codes p0449 p0452

    have a 2010 chevy impala with a natural drive conversion and was wondering on any insights of these codes.

  • #2
    Hi flavllio50,

    Those are evaporative emissions monitor codes. Since the NaturalDrive conversion is dedicated CNG all of the gasoline components, including evaporative emissions canister, was removed and the monitors should have been turned off. So this is really odd. Did you re-flash the ECU?

    Please send me a Private Message and I will see what can be done.