Warning Lights ESP and Diagnostic Light

[rootthetoot2]

Mercedes W204 - 2009 - C220 CDI - 108,000 Miles

See attached photograph. This has appeared three times in the last two weeks. When sitting on motorway about 60 mph when you hit the accelerator to get passed someone this flashes up on the dash and the car goes into limp mode.

When you turn off the car and restart the ESP light goes off and the message disappears from the screen. The engine diagnostic light goes off if you restart the car four times. After this the car drives as normal.

I also experience some acceleration issues when I try to accelerate quickly from about 50 mph onwards the car struggles on and off to get up to speed. The car has recently been serviced and nothing showed up on the diagnostics so not to sure what is going on with it.

Anyone any ideas?

 

[WG M-B]

You need to get a star test done to read the codes

 

[rootthetoot2]

I had that done when I was getting the car serviced and nothing showed up on the test

 

[Alex Crow]

...nothing showed up on the diagnostics so not to sure what is going on with it.

Anyone any ideas?

I find that very hard to believe, you really want to get back to the diagnostics, the only way forward in this case.

 

[television]

As above STAR must show that these messages have come up, who did the check.

 

[rootthetoot2]

Sorry nothing showed up on the diagnostics in relation to the acceleration issues.

The warning lights have only started post service.

 

[rootthetoot2]

Turned out that she needed a new 'quantity control value'

 

[Alex Crow]

Turned out that she needed a new 'quantity control value'

...which would have been flagged in the fault code log.

Have changed a few of these now, one of which was on a 2009 C220 CDI.

 

[rootthetoot2]

Yeah it was flagged up in the fault code log. Thankfully it was covered under my warranty with warranty direct.

Alex - check out this other post if you don't mind.

http://forums.mercedesclub.org.uk/showthread.php?t=126157

This noise has started as of yesterday. Have you come across this before? If it is from coming from the fuel line do you think it is linked to the new quantity control value?

 

[EmilysDad]

...which would have been flagged in the fault code log.

Have changed a few of these now, one of which was on a 2009 C220 CDI.

.... and what's a Quantity Control Valve?

 

[Triv]

Size of mouth!

 

[television]

.... and what's a Quantity Control Valve?

Its the valve that opens and all the quality goes," just like that" from then onwards bits start to fall off, rattle and squeak, and a new warning lamp on every other day.

 

[mersum1es]

http://www.freepatentsonline.com/5996556.html

 

[Alex Crow]

.... and what's a Quantity Control Valve?

It regulates the quantity the high pressure pump pumps, saving power and maybe wear and tear on the pump.
Along with the pressure control valve this regulates rail pressure.

Earlier CDI2 only had a pressure control valve, with the pump going flat out all the time, wasting some power.

 

[atom-ant]

C220 w204 ESP/ MIL / Cold misfire / stalling

Hi This is my first post and I understand this is an old thread.

So I have similar issues where the car would occasionally stall or may misfire on cold or sometime warm as well.

So when moving from standstill to attain speed I feel a dip just when the car is building up torque and the ESP / MIL would come on and car would go in a limp mode. On next engine start the ESP light goes away but MIL stays. Same as symptoms described in old post in this thread.

I used a cheap OBD scanner which showed P0087 and P0088 which is low and high fuel pressure related. So today I took the car to one of the garage who have star diagnostic (output attached ) and the guy said it "could be!!" Quality control valve (QCV)/PCV.

Star codes 22E7-005 and 2075-009

I wanted second opinion on this hence here,..

The issue is that the car when the fault is cleared I can drive on motorways for a very long time and its only when I am attempting to overtake or rev dropping during gearshift and going up causes this issue. Also from stand still to floor down I feel a judder/blip/dip (don't know how to explain and then it is fine.

I too thought it feels like fuel related issue. There is no other fault code registered and same comes back when cleared. Can QCV/PCV be the culprit ?


Thanks in advance.

 

[mersum1es]

It can, why your mechanic didn't perform quality control valve test? There are tests for individual components and instructions how to measure control/measure signals etc. Fuel pressure is also controlled by pressure regulator together with quantity valve. Its always worth to check condition of injectors too!

 

[atom-ant]

Thanks, to his defence he did perform all the tests via the star diagnostic equipment but all passed since readings were within tolerance level including injectors. Its the same message that comes back. The car had a service 2 weeks ago including all 4 filters replaced with original mercedes parts. The mechanic is certrain that the sender unit is not at fault and required fuel is comming to the diesel pump. So he was left with this best guestimate to change quality control valve to begin with since it can cause low/high pressure sensors to triger in rail.

One more thing i wanted to add is that the car was parked (SORN) for nearly 7 months in garage since I am in and out of country most of the time. Don't know if this can cuase things to fail.

I never had this issue in vehichle's past life and it had original merc parts for service. Still confused.

 

[television]

It is said that cars laid up for more than 6 months can cause some ECU to lose their settings.

 

[mersum1es]

It is said that cars laid up for more than 6 months can cause some ECU to lose their settings.

It's true but I think only if voltage dropped badly or battery totally disconnected long time?

 

[Heynoj]

I have the same limp mode problem - my OBD reader tells me it's P087 or P088 - I get both. I've changed the complete fuel rail as the pressure regulator seemed to be the culprit and fitted a new fuel filter but problem still exists. I'm now told it's the Fuel Quantity Valve but have no idea where this could be located and if it's sold as a separate component. Any ideas?