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Thread: Custom OS and OBD2 emission testing

  1. #1
    Lifetime Member mistermike's Avatar
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    Default Custom OS and OBD2 emission testing

    Anyone have any ideas on how OBD2 emissions testers will react to a custom O/S? Would it be recognized as the proper vehicle, or will a donnybrook ensue?
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  2. #2
    Lifetime Member GMPX's Avatar
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    I can't see why it would be a problem, unless your emmisions station looks up O.S part numbers!!

  3. #3
    EFILive Distributor dfe1's Avatar
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    The OS shouldn't be an issue, but you'll run into problems if you turn off any of the emissions tests because the PCM will never pass all the readiness tests. Instead of turning some tests off, you have to change the parameters so the test is always passed.

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