Mechanics

CEL

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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Carcrazy5series
March 10, 2010.



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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Dr. Hagerty
Mar 10, 2010.
Seems illogical the code indicates half the engine is malfunctioning and a maf would effect all the engine

Tiny
Carcrazy5series
Mar 11, 2010.
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.

Dr. Hagerty
Mar 11, 2010.
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

Tiny
Carcrazy5series
Mar 12, 2010.

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