I have had the tractor 5 years. Up til a year ago I frequently had the rpm's up high enough so there was no issues. I let someone borrow the tractor. They didn't abuse the tactor, but was unaware of the regen system. I went to use the tractor after it was returned. First thing I noticed was the rpm's wouldn't go above 2100. Then I saw the console check engine and regen . When I push the regen system button to manually regen for 3 -5 seconds, the light inside the button flashes a few time and goes out, nothing happens ( brake lock is on) . I tried pulling the throttle back , still not above 2100 rpm's. 45 minutes later, no change. I have since moved from Tennessee where I purchased it, down to NE Louisiana. So no Rural King. RK mechanic said I can find a TYM dealership, but even that is far, and no trailer + don't know anyone. I have read about resetting the regen system. So far no luck in finding instructions. Any advice sure sure be appreciated !