Hi all I have a p0101 code on my car it saying mass air flow sensor range and performance I have cleaned air filter and checked for leaks whinch I am finding hard to find a air leak what else could it be ?? Or what's thus the best place to start checking first. thank you all

Just now, Richard d c johnson said:

Hi all I have a p0101 code on my car it saying mass air flow sensor range and performance I have cleaned air filter and checked for leaks whinch I am finding hard to find a air leak what else could it be ?? Or what's thus the best place to start checking first. It's on my sq5 diesel 2015 313 bhp..thank you

Vacuum leak, wiring issue, restricted airflow or the MAF sensor itself. Difficult to say. If it were me, I’d scan with VCDS and go from there. If you’re replacing the MAF sensor, it needs to be OE. Pattern parts usually doesn’t resolve, or issue returns.

If there’s been a performance air box on the car, not sure if anyone still uses oiled K&N filters these days, then yes, replace the MAF sensor.

Thank you for the help I will keep updates how I am getting on with it and steps I am taking with it thank you again