2001 Audi TT
Problem for Audi 2001 TT

Check engine code -- lean bank code




By goldeneye46 on Sep 22, 2009

" "
check engine code -- lean bank code -1.8 engine

Solution #1

posted on Nov 04, 2009
Not Rated)

j_del

Rank: Guru  Audi Cars  Expert
Rating: 91%, 1052 votes
If that's the only code, it's likely the primary O2 sensor (before the catalytic converter). That's the one that determines the fuel mixture.
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