quattro100

I had my check engine light checked today and came up with these codes. The description was Lean Bank 1, Lean Bank 2. This light has come on and off over the last 3 months. I dont drive the car very often now so It may have only gone 700 miles during this time. Any ideas as to what it may be. Thanks.

Always Overcharged

Think they are both bank 1-sounds like o2 sensor gone or going

quattro100

I am leaning more toward the MAF sensor as it is showing on both banks and this was one of the suggestions on a website that had the information on the codes.

Always Overcharged

16555


P0171

Fuel Trim,Bank1 System too Lean

16556


P0172

Fuel Trim,Bank1 System too Rich<ul><li><a href="http://www.bentleypublishers.com/tech/audi/audi.dtc.table.htm">http://www.bentleypublishers.com/tech/audi/audi.dtc.table.htm</a</li></ul>

Always Overcharged

sorry missread code #-yep you are correct probably clean on maf may help