2001 BMW X5 HOW CAN YOU TEST A MASS AIR FLOW SENSOR

2001 BMW X5
112,322 MILES • V8 • 4WD • AUTOMATIC
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MYSWEETX5
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  • 16 POSTS
HOW CAN YOU TEST A MASS AIR FLOW SENSOR EASILY WITHOUT ANY TESTER EQUIPMENT? BECAUSE MY LITTLE CONTROL (MPG) AT THE DASHBOARD KEEPS GOING ONE SIDE TO OTHER WHILE DRIVING. BEFORE I PROCEED TO ANY OTHER PARTS RELATED, I JUST WANT TO ENSURE THAT THE AIR MASS SENSOR IS WORKING PROPERLY. OTHERWISE I PULLED OUT CODES: (P0171/P0174)
Sep 25, 2010 at 5:08 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Lean fuel conditions;

Try tapping it while the engine is idling if it reacts-clean the MAF sensor with an electronic cleaner CRC and see what happens, also might want to clean out the EGR valve if it has one and check fuel pressure
Sep 25, 2010 at 5:26 PM
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