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B5 Models Please discuss all 1996 - 2001 B5 A4 topics here...

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  #1  
Old 05-03-2010, 10:45 AM
1st Gear
 
Join Date: Jul 2009
Posts: 93
Default Fuel trim: Bank 1 : System too lean

Well my car recently went into limp mode so a friend of mine scanned it for me and this is what it came up with: Fuel trim: Bank 1 : System too lean (sorry, i lost the actual code) I already replaced the o2 censor but the problem came back. My guess is its a faulty MAF. Is there any way to test the MAF? Thanks.
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2001 A4 1.8T (Santorin Blue Mica)
2001 A4 1.8T (Aluminum Silver Metallic)
  #2  
Old 05-03-2010, 12:39 PM
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Look for a leak in a vacuum line. Not sure about the MAF, unless you have a VAG you can see if you are getting good readings with a VAG COM.
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  #3  
Old 05-03-2010, 04:04 PM
1st Gear
 
Join Date: Jul 2009
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I doubt its a vacuum leak, as my boost gauge shows around 20 to 21 inHg during idle, which if i recall correctly is where it should be at.
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2001 A4 1.8T (Santorin Blue Mica)
2001 A4 1.8T (Aluminum Silver Metallic)
Old 05-03-2010, 04:04 PM
 
 
 
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02, 1996, 2001, a4, audi, bank, bank1, bankone, fuel, leak, lean, maf, system, trim, trimbank1, tt


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