Note: This diagnostic procedure requires access to a VCDS Cable.
Connect your VCDS cable to your TDI and open the engine controller.
Clck on Meas. Blocks -08 and go to Group 003 to see the airflow MAF readings from the MAF.
Typically a faulty MAF will show a static actual value - signifying the sensor isn't reporting airflow at all - or a low value below 500 mg/str. A healthy like-new MAF will report airflow over 1,000 mg/str at full power.
If you click the 'Log' button on the bottom right a chart will show that gives a historical viewpoint of MAF performance as you drive down the road.
In this chart the Green line is specified while the yellow is actual. The two lines follow each other closely, so the MAF is reporting accurately.
Questions About MAF Performance
If you would like assistance diagnosing your MAF health feel free to take screenshots of the Group 003 display and/or the log graph and send them to us at sales@idparts.com.