Audi codes P0170 and P0173

AUDI
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ERICL503
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  • 2 POSTS
Can anyone tell me what a "fuel trim malfunction' is?
Jun 28, 2006 at 5:22 AM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
That is a mixture adjustment problem. Have the Oxygen sensors ever been replaced?
Nov 30, 2006 at 10:10 AM
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ERICL503
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  • 2 POSTS
The O2sensors have not been changed to my knowledge. The light has been off for a while now. I ran a couple of bottles of fuel system cleaner through and that seemed to help a number of nagging annoyances.
Dec 1, 2006 at 4:38 AM
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