2016 Freewheeler, ECM codes: PO120 & PO123 deleated these 2, P1510 P1511 P2135 P2176 these would not delete, went into limp mode and minimal rpm's, yellow check engine lite remains on

 

P1510 EFI Limited Performance Mode, P1511 EFI Power Management Mode, P2135 TPS Correlation Error, P2176 EFI Closed Position Not Learned.
Have you recently did a handle bar install? Have you had the twist grip sensor unplugged for any reason?
Unplug and replug the throttle body connector, there have been known issues with this. Take the positive lead off of the battery or remove the 40amp main fuse for 10 minutes.
Then try this sequence to reset the throttle: Turn the RUN switch to RUN, do not touch the throttle. Turn on the IGNITION SWITCH, wait for the CEL (Yellow engine light) to turn OFF. Turn off IGN only, wait for 10 seconds and repeat this sequence 3 more times. What it does is keeps the ECM awake for an additional 10 seconds and gives the TGS (throttle grip sensor) time to settle into a ZERO state.

 

Thanks pswomack, no work performed on handlebars or any wiring, I think maybe water got into an electrical connection somewhere. After I cleared the 2 codes it was still in limp mode, after it sat for a day I tried it again and was not in limp mode and throttle worked normally! CEL still remains on and the other codes are still there. Still warranty so took it to the dealer.

 

I'm currently having Limp Mode problems on my 14 Limited, (no handle bar mods). While on a trip this summer outside of Cody WY, mine went into LM and I rode it that way back to the motel, not fun. Finally got it to reset by lifting the negative battery cable and turning ign on and off. Next day after an hour ride heading to Riverton it did it again and reset with same method. Did it the next day going over South Pass. Stopped in to Flaming Gorge HD and they ran some tests and ordered a new ECM, which was installed a week later, (trailered the bike to them). Last week I went for a ride and it happened again, about 200 miles since new ECM, and this time it would not reset so I had to get my truck and trailer and haul it to Beers HD here n Vernal. They spent a lot of time testing wires and the connectors and everything appears to be in good shape. Diagnostics are pointing to TCA. New induction module may be in today and we will go from there.

Glad I have the ESP.

 

Dealer replaced ECM, codes still came back, ended up replacing throttle body and throttle by wire and no more codes!

 

I've put a few hundred miles on mine since the throttle body, (TCA), was replaced and I'm keeping my fingers crossed.

 

I believe HD recommended Nyogel 760G on the non-golden TB connector pins to mitigate fretting corrosion.....some folks used regular dielectric grease but I believe 760G is specially formulated to prevent fretting....based on your findings it looks like maybe even the gold plated pins could benefit from this...somehow this message wound up in the wrong discussion thread.

 

I know this is an old thread, but we all know that a little lessons learned can always help others troubleshoot. My buddy had this issue for a few days, spent one day at the dealership with no answer. After troubleshooting himself, he learned that his throttle connector under the nacelle (Road Glide) was getting wet and shorting itself out. Put some dielectric grease on the connector and hasn't had a repeat of the problem.