1998 Audi A4 Mass Air Flow Sensor

1998 AUDI A4
140,000 MILES • 6 CYL • AWD • MANUAL
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NWIRTH
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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?
Aug 18, 2008 at 4:25 AM
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SERVICE WRITER
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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.
Aug 18, 2008 at 5:43 AM