I came across with a FB post couple of months ago that someone took his expensive car with MAF sensor issue to a mechanic workshop. He ended up being charged for a scan fee but the mechanic in the workshop didnt fix the issue as the car was still idling rough when he went to pick up his car. Just like any other sensors in a car, MAF sensor is also one of the electronic devices in today's modern and complicated vehicle's engine management system. The device needs to be checked