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12-04-2005, 11:59 AM
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Error Code - Running Lean
My car seemed slow yesterday, then my CEL came on. Brought it to Autozone and got it scanned, it was Error Code P1128 - Manufacturer Control Fuel/Air Metering, then he looked in his computer and it said "Upstream O2 Sensor Swapped" for that code, and online it said "Long Term Fuel Trim mult.,Bank1 System too Lean." I'm thinking maybe the pre-cat O2 sensor is shot?
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Brett || 2007 GTI 2.0T RIP the "Real" VWForum February 2002 - April 2008 
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12-04-2005, 03:34 PM
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My bet would be on the O2 sensor.
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12-05-2005, 09:07 PM
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We need a more popular Audi section
 Anyway, after doing some research it looks like it's most likely my MAF sensor, and it also looks like it has an extended warranty, so hopefully it will be FREE! I like free stuff.
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Brett || 2007 GTI 2.0T RIP the "Real" VWForum February 2002 - April 2008
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