Do you have an ODBII scanner in your tool box? I have one, there good for reading your own cars computer. You have to have faith in what your cars diagnostic is telling you. I am learning about these mas sensors and the motors operation. It took me a few looks at my car before i found a cracked hose on the motor.
The mas sensor is designed into many different manufacturers automobiles, so it would be good to keep in mind when buying any automobile.
My car is a KIA and is eight years old. when i had it serviced in the past it was returned to me with loose intake parts. I am also leary about bringing my car in for service to the dealer , paying high costs and getting my car back in such poor shape. Just keep looking for poor connections and broken or cracked rubber parts. usually finding the bad part or problem, requires taking things apart, digging and inspecting them. The Computer is connected to all the sensors looking for any problem,or change the sensor reports and and adjusting how the engine runs.