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?


Via Email


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.



Related Videos:
Troubleshoot with Harley Error Codes

Have more questions? Check out the Tags here and our Q&A index page to find some answers here.

Share tips, start a discussion or ask one of our experts or other students a question.

Make a comment:
500 characters remaining

5 Responses to “Harley Diagnostic”

  1. William Dixon

    I have a 2013 FLHTK my cruise control is not operating the red light comes on in the tach but will not set I put it in self diagnostic mode and it gave me a pn of 32836-09A I have not been able to find this part by number. any help would be apprecated.

  2. 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?

  3. 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??

  4. William

    I have a 2012 Softail Classic and would like to know how to clear error codes.

  5. Larry

    Why does my 1995 road King 80 c evo get sluggish after wormed up?