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What happens when a cat converter is missing ?

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  • What happens when a cat converter is missing ?

    Does the OBD II system just set a cat low efficency code ? Or ?

  • #2
    Set a code is all it does. It doesn't affect the performance in any way. You can use a square wave generator (simulator) to inject a signal to the ECU and that will prevent the code from popping up.

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    • #3
      Thinking of transplanting a modern power train into a classic truck. Thanks.

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