2016 Sportsman 570 CK ENG code 3698 4

Hi folks, new owner here. Had the atv for a 3 weeks and already in limp mode with engine code 3598 4 (ECU output supply voltage 2 low). Pulled the fuse box cover and checked as much of the wiring harness I could and can not see anything out of sorts. Also swapped a few of the relays around, no dice. I was able to clear the code by disconnecting the battery for a few hours, however code came back after a few minutes of riding. Initially problem "seemed" to happen after getting a little air off of a rise by the garden. I dont even think the back tires came off the ground. Also, it tends to crank slow or makes a high pitch noise when I initially turn the key.

Where should I continue looking?

2016 Sportsman 570 CK ENG code 3698 4

Hi folks, new owner here. Had the atv for a 3 weeks and already in limp mode with engine code 3598 4 (ECU output supply voltage 2 low). Pulled the fuse box cover and checked as much of the wiring harness I could and can not see anything out of sorts. Also swapped a few of the relays around, no dice. I was able to clear the code by disconnecting the battery for a few hours, however code came back after a few minutes of riding. Initially problem "seemed" to happen after getting a little air off of a rise by the garden. I dont even think the back tires came off the ground. Also, it tends to crank slow or makes a high pitch noise when I initially turn the key.

Where should I continue looking?