This fault is not on the engine management side on my sapon mt2500 itit's under the abs system fault codes, after Alot of head scratches and a rollie, I checked the earth's an found one was a bit grubby so I cleaned it all up an now it runs better.
I also had the service, esp, abs, management lights on an after playing with the brake sensor an the earth I have only two problems the serv light is still on, and the esp light will flicker if I'm reving her high an it makes it bog down.