1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Audi A4 Avant 1.8T Fault code help

Wilo May 7, 2010

  1. Wilo

    Wilo Member

    30
    0
    6
    Hi All

    Last week my engine management warning light came on and the car started to cut out sometimes when left to idle (like you has stalled it) i managed to borrow a VAG diagnostic tool and it came up with the below faults,
    "boost pressure regulation valve (N75) open circuit P1548"
    and
    "fuel trim bank 1(multi) system too lean P1128 - sporadic 001-Upper"

    Can any explain these fault to me if possible?

    I cleared them on the VAG tool and now the car is running fine ?

    Any ideas?

    Thanks
     
  2. Wilo

    Wilo Member

    30
    0
    6
    bump anyone got any ideas
     
  3. simon.m

    simon.m Active Member

    2,747
    6
    38
  4. B5NUT

    B5NUT Well-Known Member VCDS Map User quattro Audi A6 Audi Avant Owner Group s tronic S-line owners group

    4,000
    764
    113
    On the older B5 the wiring to the N75 valve used to break and cause the open circuit fault, the other option is it could just be a fault valve.

    Sorry cannot help with the second fault, did a qcick google on the fault and found this http://www.vwaudiforum.co.uk/forum/showthread.php?t=74455
     

Share This Page