Hey guys,

This is an E 320 CDI with I6 engine.

My check engine light turned on and I scanned the car and got this error code. Anyone familiar with this? I searched around and stuff but nothing i could use .

Anyway i cleared the error, it comes back as soon as i step on gas and car goes into limp mode. It's totally powerless.

Usually when I get overboost code on my GTI it usually means something else is up, what are the chances of wastegate failing? almost none... i once had similar situation with GTI and it was bad MAF sensor.

What are the normal g/s MAF readings with a working MAF? I logged around 200g/s at wot (4500+ rpm). Is this ok?

 

Trace the vacuum line connecting to the wastegate back to the transducer. It receives electrical signals and then provides vacuum controling the wastegate. Problem can be either electrical or vacuum supplied from the pump. You'll want the test parameters from WIS.

 

Does the CDI have a traditional wastegate, or is it VTG operated?

 

Little update on this, went to mechanic..he scanned it for codes and stuff and pulled out two of them (to my surprise), i used generic OBD2 scanner, he is using Bosch ESI[tronic], codes:

P2510
P2228

Any one of you wanna help me diagnose these? I know what they mean by looking at general OBD2 code list but he says not all codes mean the same thing, he printed out the whole list of codes and explanations for my car and surely explanations totally do not match with traditional OBD2 codes.

Anyway he says something is wrong with boost and car is going into limp mode and it's gonna be very hard to diagnose. He pointed at electronic wastegate that sits on turbo itself and said it's probably something to do with wastegate itself but he can't be sure, he tested it and it responds BUT he says it takes a fraction of second for it to get stuck and for boost to shoot over the limits specified and car to go into limp mode and throw a code. Wastegate itself can not be replaced, it goes together with turbo...so the whole thing has to be replaced which costs around $2500 + labor another $500 or so...which wants to make me burn my car.

If anyone has any idea what to do, please advice. Could this be faulty MAF or something?

 

It might be worth letting the dealer look at this - if the mechanic is saying you need to replace the turbocharger. Although that could be the problem, I would say there is a 99% change it is not the turbocharger assembly.

The dealer can appropriately diagnose it with SDS and would have more adequate tools to get to the bottom of it.

As you can tell, your car is not safe to drive the way it is - when it loses power, it will not get out of its own way.

 

Honestly I trust more this mechanic than MB dealers, anyway he didn't say that anything is wrong with turbo itself, he said electronic wastegate that these cars have are attached to turbo and are not sold seperately so you gotta buy whole turbo assembly if wastegate goes.

Anyway yesterday i unplugged wastegate electronic contact, drove a car around and i saw P0243 pending (no wastegate error), then i reattached contact, cleared codes and let car sit for a while...it got out of limp mode and I drove it for a while ...it didn't go into limp mode. Hopefully it will be ok. One more thing to notice is that wastegate is covered in oil, possibly from PCV system...there is definitely some oil leaking from somewhere, no fresh oil tho'.

Did anyone install catch tanks on these cars?

 

Well, visited MB dealer, threw away $100 for 15 mins...they said the same thing, could be wastegate thing and most definitely it is but not 100% sure... car is in limp mode again :/

 

Can anyone do me a favor and see if wastegate is moving up and down when engine is reving at idle? Or if its possible to move wastegate by hand? It's very accessible, just under airfilter housing.

Thank you

 

There are no vacum hoses, this turbo has electrical wastegate, its mounted directly on turbo itself and can't be bough seperate, you gotta buy the whole turbo

 

The actuator can be reviewed! What did you do?

 

P0244 code turbo actuator repair.

 

Here is a guide on how to change the wastegate solenoid.

https://www.youcanic.com/wiki/merced...id-replacement