2001 BMW 530 CEL

  • Tiny
  • carcrazy5series
  • 2001 BMW 530

Engine Performance problem
2001 BMW 530 6 cyl Two Wheel Drive Automatic 77,000 miles

dealer says I need air flow sensor has codes p0174 -p1620 car runs fine

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Wednesday, March 10th, 2010 AT 2:54 PM

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  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,717 posts

I want to ask what you need from our site, it seems you have made a statement, is there anything else?

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Wednesday, March 10th, 2010 AT 11:03 PM
  • Tiny
  • carcrazy5series
  • Member

Seems illogical the code indicates half the engine is malfunctioning and a maf would effect all the engine

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Thursday, March 11th, 2010 AT 7:45 AM
  • Tiny
  • Dr. Hagerty
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  • 9,717 posts

The OBDII P codes are sometimes misleading. When dealing with BMW, I usually like to see the manufacturers faults which are in hexadecimal. The P codes can certainly be interpreted to indicate the air mass is at risk and to satisfy my curious nature, I would like to know what the air mass is showing when at idle, it might help guide the diagnostic process.

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Thursday, March 11th, 2010 AT 10:17 AM
  • Tiny
  • carcrazy5series
  • Member

The fuel trims are somewhat even but slightly elavated 7% b1 9%b2 the cel will only occur during long 65-70mph cruise of nearly an hr. Can't find vac leak but still think it is one

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Friday, March 12th, 2010 AT 3:14 PM

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