Hi guys!

When i floor it in 4 gear and the RPM reaches 6000 the boost keeps going up n down. Checked it with my computer and the following faults came up:
CODE001:
P2007 B28 (Pressure sensor) (P0105)

CODE002:
Malfunction of secondary injection (function chain) (P0410)

CODE003:
P2069 Component N15/3 (ETC control module) memory is fault. (P0700)

Then i erased all the faultcodes, tested for 2miles and following fults came up:


CODE001:
P20D4 The load limit is active.


CODE002:
B28 ( Pressure sensor) (P0105)

The car is Lutz Lehmann tuned... somewhere around 420-450Hp

http://www.aof-tuning.de/

Please please somebody help me.

it sounds like you are hitting the limit on the pressure sensor...

when you had the car tuned, did they change that?

when i check for codes, i usually have the P0105 code stored in memory, but it is not an active check engine light...

i have never seen the P20D4 code on my car...

what else do you have done to your car besides the tuning?

What has been done to the car?

Hi,

Im not sure exactly whats been done with my car. I Bought it 1 week ago from Germany.
The "check engine" light has never been lit.
I felt it in 3, 4 gear by high rpm, its like the boost drops to zero in just a second and, feels like a "pulse" .....

ok, then it may be your intercooler pump that has gone bad...

Tested the pump and it seems to work.....

well, the only other thing that i can think of is that your pressure sensor is going bad...i don't really know how you test that though

vadim, any thoughts?

Se what my Mercedes Dealer will find on it on Tuesday, they have to fix some things (warranty)

Or should i change the pump anyway??

the pump will either work or it won't, there is no in between...

as others have experienced though, usually the dealer can not determine whether or not the pump is working unless they test it directly...and most dealers do not go to the trouble of doing that...

let us know what the dealer says...

Ok i will do that, any idea what the pump costs?

depends on whether you do it yourself or not...i did it for $80 and bought a ford lightning pump...there is a how-to in this section of the forum, just search for it.

if you have the dealer do it, i think someone said it is about $500-600 installed...big difference

Checked the the pump today and it works like i should.
Maybe the airpump ?

there is a campaign for the air injection pump, ask your dealer about it...

I have the same exact problem, symptoms, and error codes! I've heard it could be a clogged/faulty EGR valve? Did you get your problem fixed? What was problem and solution? BTW I had car corrected at dealership for the secondary air pump campaign - then the problem occurred!

Did you ever fix this?

To everyone else: Do you guys know where EGR valve is located and if a cat melting could affect it in any way?

What he described sounds like an overboost condition causing the ECU to shut off the fuel momentarilly, but might also be caused by a bad boost pressure sensor telling the ECU that it is over pressure. I have not experienced this in the C32 but have had it happen in other FI cars that were tuned near the limit.

Knowing the mods would help.

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Huh? Your post makes no sense in the context of this thread. It was also from 2008…