Harley Diagnostic

Question Error codes, po577- cruise high input? I need some Harley diagnostic info please. Also it has code # p0031, I cannot find any reference, can you help a brother out?

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Answer If you are not having a problem with your cruise control, just clear that code #P0577. It can be caused by moisture. Code P0031 is O2 sensor.

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7 Responses to “Harley Diagnostic”
  1. Dale Gibson
    Dale Gibson

    I have a P2102 code and a PO577 code on my 09 ultra. I got these two showing up after a long road trip and the last 50 miles was rougher highway. Are these related to jarring of the bike and I read that moisture can cause the PO577. I’ll clear it and see if it returns. The P2102 might be a bad throttle issue? Wiring and corrosion I suppose??

  2. John Drobnica
    John Drobnica

    I’ve a 2017 Heritage Classic, and after installing an after market LED strobing brake light the security light would come on periodically. No change in performance. I followed Eagle Lights instructions to reset the LED with my bike, no joy. Had two codes, b2161 ‘brake lamp output open’ and b2271 ‘low voltage.’

    They sent me a resistor to install in the rear brake harness under the seat, and this eliminated the low voltage code, but the b2161 persists. BTW, I did replace the battery as it tested weak and it was the 4 year old factory battery. Would you suggest my next move, prior to visiting the dealer?