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  1. Code P0638

    Thank you for the reply. I'm not familiar with the TuneECU. I have a Triumph Engine Management Diagnostic Kit. I will try and see if I can use it to fix issue.

  2. Code P0638

    2005 Triumph Rocket III, kicking code P0638 Secondary Throttle Circuit Malfunction. Replaced Secondary TPS. No joy. Any suggestions?
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