Diesel engines in trucks and some passenger vehicles can derate power and go into limp mode, and this can be caused by a ...

Add Yahoo as a preferred source to see more of our stories on Google. When a semi truck's diesel engine derates, it typically means the electronic control unit (ECU) has detected faults and has ...

Semi trucks need a lot of power to carry their cargo on the road. That's why it can be a huge problem for the driver if it ends up derating.