Hi, we have an opel opc 7 seater and need a second opinion on what our current mechanic says is wrong with the car. I find that he is bullsh*tting is with things thats wrong on the car. we have it fixed just to find out that the issue we just spent money on fixing wasn't really the issue its something else. he is just doing process of elimination and costing us money. long story short, had car fixed and now there is no power when stepping on accelerator. diagnostic test showed only 35% power and one sensor not sending any signal. so the car drives but not at its full potential. we were now told that we need a motherboard for the accelerator???