1998 Audi A4 Mass Air Flow Sensor

Tiny
NWIRTH
  • MEMBER
  • 1998 AUDI A4
  • 6 CYL
  • AWD
  • MANUAL
  • 140,000 MILES
My Audi will not pass the Illinois Emmissions test due to the fact of the Service engine light is on. I have a scanner and have gotten the code P0102 - Mass Air Flow sensor low CKT input, I have changed the MAF sensor along with the vacuum hoses and then Erased the code after that but the light comes back on saying the same code. The car now runs perfect, what else could be the cause of the same code showing up if I have replaced Maf sensor?
Monday, August 18th, 2008 AT 4:25 AM

1 Reply

Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
The MAF may be geting contaminated from oil further back in the air intake system. Turbo hoses, air filter etc.

Also possible of a defective MAF. Was it a rebuilt one? An OEM one? These cars do go through them. I would use an OEM on this one if it was mine.

Be sure there are no other vacuum leaks.
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Monday, August 18th, 2008 AT 5:43 AM

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