Fingers crossed it’s all sorted now, it was in the garage for 2 weeks and the mechanic traced it back to the Pressure Sensor (somewhere on the exhaust) I was shocked as thought it would be a wheel sensor but I’m 140 miles in from leaving the garage and all is well no check engine light! When he plugged his diagnostics machine in it came up with like six different fault codes and one was to do with the accelerator pedal response failure it’s definitely a tricky oneDid you get anywhere with this? I came here looking for a solution to the same thing. Something similar just happened to my van and has now been at garage for 2 weeks. The accelerator developed a mind of it's own, high revving when I'm trying to slow down. Traction control and engine light on. It's just gone to an auto electrical specialist and they're a bit puzzled!