Turbo, rare issue!

[clk320x]

Hi guys!

My E class drives excellent 99% of the time, however once every few weeks it will go into ‘limp home mode’ (no warning lights etc.)

It will still drive fine, but there will be no boost. Pulling over and turning it off and on will resolve this.

Anyway plugged in Star and the codes stored are below:

- 2510-001 Check component Y100/1 (Right charge pressure positioner) Positioner signals fault. (Stored)

- 2632-008 Check system ‘charge pressure control’ Charge pressure is too high. (Stored)

The fact it drives perfectly 99% of the time makes me wonder how the turbo can be faulty?

The turbo actuator was replaced before, but the symptoms remain. I suppose I need the entire turbo unit replaced? Weird?

I think the replacement actuator was faulty.

I had a look on ebay, and there are refurbed turbos for around £250. I would need to send my old unit back after it was removed.

Turbocharger Mercedes E320 S320 CDI 150kw A6480960299 A6480960099 +Gaskets | eBay

Mercedes E S class 320 CDI W211 W220 743436 GTA2359VK 150 Kw 204 HP OM648 Turbo 768240650255 | eBay

Any advice?

Thanks

 

[bembo449]

defo reads like the actuator if faulty pal , does it activate if you flick the ignition on and off ? obvs need the engine cover off to see it working

 

[LostKiwi]

Those look like boost control issues not turbo issues.
It may be the vanes in the turbo starting to stick I suppose causing positioner errors and over boost.

 

[clk320x]

Thanks for the replies guys,

My garage tested the actuator using star and it seems to be working ok.
Not sure if I should contact the actuator company and put in a warranty claim? I suppose as it was a rebuilt one it could be faulty?

The issue only presents itself once every week maybe even once a fortnight. Very confusing! Otherwise the turbo seems fine.

Car has done 230k but most motorway.

 

[V6Matty]

I had exactly the same issue on my 270 years ago, I was told actuator or turbo needed to be replaced, I did neither and replaced an O2 sensor on the intake, didn’t have a problem for 40k miles until I begrudgingly sold it.

 

[clk320x]

I had exactly the same issue on my 270 years ago, I was told actuator or turbo needed to be replaced, I did neither and replaced an O2 sensor on the intake, didn’t have a problem for 40k miles until I begrudgingly sold it.

Oh wow this is confusing isn’t it haha

Do you remember if there were any codes for that sensor pal?

 

[onefortheroad]

Common fault is the exhaust back pressures sensor.

 

[clk320x]

Common fault is the exhaust back pressures sensor.

Won’t that throw a code though?

 

[onefortheroad]

P0472 usually. Best to get the live data from it when the engines running.

 

[clk320x]

P0472 usually. Best to get the live data from it when the engines running.

No codes like that unfortunately, only the two I listed in the first message 2510-001 and 2632-008

 

[clk320x]

?

 

[ajlsl600]

doubt that a turbo,mechanical issue, more like a faulty connection,electronic component , providing signal.or no signal putting engine into limp. if so you just have to keep plodding away at checking signal,voltages wires ect until the culprit is found, earlier this yr i had about three weeks of that before discovering a rodent had just about scoffed thru two fairly essential wires ,all good since. you have my sympathy ,do let us know what turns out to be the issue ,worth looking LK in earlier post clue.. but once,if turbo spinning unlikely any crud stopping it . any rubbing sounds as turbo spins down ? does it do this at about the same load ,rpm, each time? or is it completely random ?

 

[clk320x]

doubt that a turbo,mechanical issue, more like a faulty connection,electronic component , providing signal.or no signal putting engine into limp. if so you just have to keep plodding away at checking signal,voltages wires ect until the culprit is found, earlier this yr i had about three weeks of that before discovering a rodent had just about scoffed thru two fairly essential wires ,all good since. you have my sympathy ,do let us know what turns out to be the issue ,worth looking LK in earlier post clue.. but once,if turbo spinning unlikely any crud stopping it . any rubbing sounds as turbo spins down ? does it do this at about the same load ,rpm, each time? or is it completely random ?

Hi mate,

I think you are spot on, just had a google and someone else had same issue. Ended up being 2 wires of the 6 wires from the ECU>Turbo intermittently losing continuity. He ended up replacing the turbo for no reason!

It really rarely happens, maybe 1 time every 1-2 weeks or something?

Tends to be random to be honestly mate.

Cheers

 

[Benzi91]

Ive been getting this same problem on my E250. Getting it serviced next week so going to ask the guy to check it out whilst its there.


Sent from my iPhone using Tapatalk

 

[V6Matty]

Oh wow this is confusing isn’t it haha

Do you remember if there were any codes for that sensor pal?

I think it was something along the lines of the second fault you had charge pressure to high, afraid I no longer have the paperwork for the car or I'd have taken a look for you, I could try giving the Indy a call and see if they happen to have the info still?

 

[Cole@MBS]

This is a very very common fault, the two codes are when the turbo actuator goes tits up, just the turbo actuator fault and no back pressure sensor can be one of four of five faults on that signal line, most common in the inlet port shut of motor, the same goes for a single fault code for just the back pressure sensor, I no the codes don’t always make sense, but this is where idiots like us doing it day in and day out, we just no what they mean and what the cure is!!! We used to fit reconditioned actuators but they kept coming back so now we just fit turbos from Garrett, no more problems......

 

[EmilysDad]

.... We used to fit reconditioned actuators but they kept coming back so now we just fit turbos from Garrett, no more problems......

That's what the Merc indie I took my car to said .... so far my recon actuator is holding its own. £200 vs £2500 on a 10 yr old car was/is a risk I thought was worth taking.

 

[clk320x]

I think it was something along the lines of the second fault you had charge pressure to high, afraid I no longer have the paperwork for the car or I'd have taken a look for you, I could try giving the Indy a call and see if they happen to have the info still?

Thanks so much for the offer pal, but don’t want to give you too much hassle

Looks like I may have to budget for a new turbo!

 

[clk320x]

This is a very very common fault, the two codes are when the turbo actuator goes tits up, just the turbo actuator fault and no back pressure sensor can be one of four of five faults on that signal line, most common in the inlet port shut of motor, the same goes for a single fault code for just the back pressure sensor, I no the codes don’t always make sense, but this is where idiots like us doing it day in and day out, we just no what they mean and what the cure is!!! We used to fit reconditioned actuators but they kept coming back so now we just fit turbos from Garrett, no more problems......

Cole have you seen this?
https://forums.mbclub.co.uk/threads/2004-w211-e320-cdi-turbo-trouble.117939/

Someone with an identical issue to mine, claims that there were 2 wires on the harness from ECU> turbo intermittently losing continuity. Do you think that could be a possibility?

 

[ajlsl600]

This is a very very common fault, the two codes are when the turbo actuator goes tits up, just the turbo actuator fault and no back pressure sensor can be one of four of five faults on that signal line, most common in the inlet port shut of motor, the same goes for a single fault code for just the back pressure sensor, I no the codes don’t always make sense, but this is where idiots like us doing it day in and day out, we just no what they mean and what the cure is!!! We used to fit reconditioned actuators but they kept coming back so now we just fit turbos from Garrett, no more problems......[/QUOTE

in the spring i will likely be looking for another car .over complicated over priced stuff like this will be on my list of what to make sure i avoid buying into i cant say i am familiar with this turbo ,actuator motor assly.. so i am guessing that ALL this is pretty close to the turbo and a good amount of heat , cant imagine electronics, electrics,motors ect being much of a good idea anywhere near that .even older mechanical waste gate systems periodically used to sieze the waste gate butterfly spindles . make it simpler ,not more damn complicated ( expensive ) nothin complicated lasts.......