2001 BMW 530 cel

2001 BMW 530
77,000 MILES • 6 CYL • 2WD • AUTOMATIC
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CARCRAZY5SERIES
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  • 4 POSTS
dealer says i need air flow sensor has codes p0174 -p1620 car runs fine
Mar 10, 2010 at 2:54 PM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
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I want to ask what you need from our site, it seems you have made a statement, is there anything else?
Mar 10, 2010 at 11:03 PM
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CARCRAZY5SERIES
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  • 4 POSTS
seems illogical the code indicates half the engine is malfunctioning and a maf would effect all the engine
Mar 11, 2010 at 7:45 AM
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DOCHAGERTY
  • ✓ASE Certified Mechanic
  • 9,606 POSTS
  • ASE Certified Mechanic
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.
Mar 11, 2010 at 10:17 AM
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CARCRAZY5SERIES
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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
Mar 12, 2010 at 3:14 PM
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