s ® #sn18639 269.95 used from 95.00 airflow meters also called a massair ... sensor these devices are supposed to measure ... the amount of air the engine is taking in to correctly ... fail in the newer vw® s usually a bad airflow meter will cause the check engine ... some of the new vw ®s use a dual mass flywheel the 1.8 turbo and tdi® models ... clamp two the #3 injector has a sensor that the brain uses to compare the ... to the timing electronically if this sensor fails the electronics go into the limp ...