Evaluation: Inducted air mass, display

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1999 Volkswagen Jetta, 1998 Volkswagen Jetta, 1997 Volkswagen Passat, 1997 Volkswagen Jetta, and 1996 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.

EVALUATION: INDUCTED AIR MASS, DISPLAY

Scan tool display	Possible cause	Corrective action
Below 750 mg/H	Revs. too low or too high	Read specified value at 3000 RPM
	Boost pressure too low	Check boost pressure control, see TURBOCHARGER, CHECKING (ENGINE CODES 1Z, AHU)
	Mass Air Flow sensor faulty	Check EGR and Mass Air Flow sensor functions, see EXHAUST GAS RECIRCULATION (EGR) AND MASS AIR FLOW (MAF) SENSOR FUNCTIONS, CHECKING If there is a malfunction, the measuring value block indicates a constant air mass value of approx. 550 mg/H over the total speed and load range