Hi

I think my mini cooper s r56 n14 need to change map or t map sensor .. is there a way to check if they work or not (obd bluthooth reader) .. when I opened my air intake system , I started the car and unplugged the sensor that located under the air intake and the car started to shake and I fixed it again , by logic it means the sensor is working will .. but when I unplugged the t map on the left side of the car , nothing is changing with the car sound or shaking same as the he other sensor so by logic it means it is not working ..

So how can I know before changing them

When I drive the car the rpm will pull very slow in first and second gear like something is holding it .. sometimes miss fire also

By the way no check engine light for the sensors only for thermostate error (thermostate house replace)

 

With dashcommand app or torque app (depending on what kind of phone you have) you can monitor intake air temp. See if it changes when you unplug the sensor. If it does, then I would assume its working.

 

A faulty thermostat can send all sorts of bad info to the ECU. If that's your code, replace the thermostat before worrying about the MAP sensors.

When I connected my FCD's, the MAP sensors were monitored with a VOM --- 0 - 5VDC. Linear change proportional to manifold pressure. Painful to connect and monitor.

The OBD connector has one MAP reading. How the ECU reads and calculates the two sensors to get one reading has yet to be explained to me. Anyone know for sure?