[E90_boostjunky]

My half check engine light came on few days ago after WOT it disappeared for a few days now its back on. I read the codes im getting: 20 (twenty & zero on the dash) 31(three & one) and 2A4 (20 100 40 on dash). I tried searching couldn't find anything thanks.

[e92_enthusiast_1]

Do you get Engine Malfunction, Reduced Power! message?

Check your charge pipe and lines imo. Something mighta popped or came loose at WOT. Does it feel like you're boosting ok? Not feeling sluggish is it?

[E90_boostjunky]

Originally Posted by e92_enthusiast_1

Do you get Engine Malfunction, Reduced Power! message?

Check your charge pipe and lines imo. Something mighta popped or came loose at WOT. Does it feel like you're boosting ok? Not feeling sluggish is it?

Yeah thats what it is malfunction reduced power. No it doesn't feel sluggish. But when I step on the gas it is sluggish when the lights on. When I turn the car off and back on it disappears and drives just fine.

[e92_enthusiast_1]

Sounds like a vacuum leak under higher boost pressure. Happened to me but it was an easy diagnosis cause my charge pipe basically exploded on one end. The cp is on the driver side under the airbox. You should see if it looks OK from both ends. The end by the throttle body is hard to see w/o removing the airbox though. That's where mine went bad.

my CP woes

Originally Posted by E90_boostjunky

Yeah thats what it is malfunction reduced power. No it doesn't feel sluggish. But when I step on the gas it is sluggish when the lights on. When I turn the car off and back on it disappears and drives just fine.

[ken1137]

When I had a boost leak(@ cp) I could boost up to 9-10 psi, but it would fall flat soon after when I had Cobb Stage II. When I had injector issues the half engine light would turn on, loss of power, and a bit of shaking would occur as soon as I went WOT. The half engine light would not return unless I went WOT again. GL! always fun to figure out

[E90_boostjunky]

Originally Posted by e92_enthusiast_1

Sounds like a vacuum leak under higher boost pressure. Happened to me but it was an easy diagnosis cause my charge pipe basically exploded on one end. The cp is on the driver side under the airbox. You should see if it looks OK from both ends. The end by the throttle body is hard to see w/o removing the airbox though. That's where mine went bad.

my CP woes

i think your totally right, because i haven't ran map 2 in about 4 months, and i did a few runs with my buddy in his e60 m5, running map 2, thats where it began. I'm just gonna stick to map 5 and see if its ok for a few days because it hasn't came back on as of now. Do you think a new charge pipe might fix the problem then? Thanks again.