would this cause a code reading secondary air flow .
Audi Q&AAsk Your Question
2001 Audi TT Quattro Question: pressure relief valve
Answer #1overbys from Overbys Inc, May 19, 2011, 15:29Master
please provide the P code number of what you found. also,
is this a TT roadster (engine code AMU) or a TT coupe (engine code AMU or ATC or AWP)???
Replyjims repair, May 20, 2011, 07:11Rookie
the p code is po411 engine code is amu this is a tt coupe 1.8 liter 225 hp with 46000 mi. thanks for the reply.
Replyoverbys, May 20, 2011, 07:49Master
p0411 is secondary air system; throughput faulty
(1) check secondary air injection (AIR) system
(2) check wastegate bypass regulator valve
Replyjims repair, May 20, 2011, 19:12Rookie
thanks for the help ,will check these 2 items.as a side note the engine light only comes on when car is cold. and it runs great light or not.