High idle?

Halfway into my last atv trip, my scrambler started idling about 400 rpm higher than normal. It runs fine, but I have to shut it off to switch gears. I bypassed the ETC quite sometime ago because I was getting stuck throttle codes. I would also occasionally get high and low voltage TPS codes. Does anyone have some ideas what it could be?

High idle?

Halfway into my last atv trip, my scrambler started idling about 400 rpm higher than normal. It runs fine, but I have to shut it off to switch gears. I bypassed the ETC quite sometime ago because I was getting stuck throttle codes. I would also occasionally get high and low voltage TPS codes. Does anyone have some ideas what it could be?