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Discussion Starter · #1 ·
I did some research and noticed that the codes P1128 and P1130 are:

17536 P1128 Long Term Fuel Trim mult.,Bank1 System too Lean
17537 P1129 Long Term Fuel Trim mult.,Bank2 System too Rich
17538 P1130 Long Term Fuel Trim mult.,Bank2 System too Lean

However when I went to AutoZone to get scanned for codes...the description on their scanner for P1128 was "Manufactured controlled fuel and air metering", same for P1130. What gives??
 

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Try cleaning the MAF 1st. P1128 was my MAF on my 1.8T, tried everything else but had to replace it.

Check the usual suspects. Vac lines, plugged snow screen, plugged air filter.

The pre-cat O2 sensors are behind the heads. If you look down the exhaust, you can almost see them. You need a special socket or a crow's foot wrench to get them out. I got mine from Autozone.
 
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