Mass air flow sensor

Asked by GuruC7GJR Mar 12, 2019 at 02:12 PM about the 2001 BMW 3 Series

Question type: Maintenance & Repair

What's the process to changing the maf sensor
..the scanner threw out a code p0174

2 Answers

1,380

A mass air flow sensor is going to affect both banks not just one

1,380

Need to monitor the bank 2 oxygen sensor signal and see if its pegged lean(low voltage) it might be a wideband o2 so ud wanna look at the milliamps(would above 0). U cld try to introduce some kind of carb clean to try and drive it rich... if you cant then its possibly shorted to ground or a fault sensor

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