Low signal turbo actuator fault
 

My c30 d5 has gone into limp mode, popped to the garage this morning and came up withe above fault, they reset everything but car was straight back into limp mode, anyone any ideas on this before I have to get the garage involved

Any help or advice is much appreciated

Ta

No one got any ideas?

Did you take it to a Volvo dealer?

Sorry, but I don't have a clue what it could be...

No, I took it too a garage near me, they plugged it onto there snap on computer and that's the fault that was logged

Does anyone know the going rate at dealers for a diagnostic check? Would they give me an idea of the problem if I don't take it there for repair

Sorry for the questions, but do you guys think this is ok to be driven whilst in limp mode?

Got the actual fault codes today

6820 turbo control actuator signal too low
683d turbo control actuator faulty signal

Are these any help to anyone

Ta

Seeing as nobody else has offered help (seems like the C30 is frowned upon at time here), my suggestion would be that if you are not confident under the bonnet just take it to a dealer. Sure it'll cost what it costs, but as long as it is fixed correctly that is all that matters.

Good luck and let us know how you get on.

Hi there,

I know the last post was some time ago but I have the same error occuring on 2008 V50 D5 connected with 18B0 and 1507 (couldn´t translate error code from German but I think google can help).
After deleating the errors the car was still low in power and without any boost from 50km/h on.
After driving for some days it suddenly went away and acted nearly normal. When accelerating hard and over 2000 U/min the car started shaking.

I checked turbo hoses for leaks but found none.

Next thing I will do on the weekend is disassemble the turbo actuator and maybe turbo itself.

My suggestion is: The VNT ring is klogged due to unburned disposits. The intake manifold I cleaned 10.000 km ago looked horrible. EGR was also klogged and caused exhaust smell inside the car due to leakage before EGR valve (at the corrugated metal pipe from exhaust to EGR).
I am pretty sure the turbo wont look much better after 310.000km. This in mind the actuator has to work against a much higher restistance and the worm gear wears or even breaks.

So To-Do for the weekend:

- check free movement of VNT linkage after disconnecting from turbo actuator
- disassamble turbo actuator to check worm gear
- if free movement of VNT isnt given --> remove turbo and exhaust housing to take an interested look on turbine and VNT

Ill keep you informed
Be kind and greetings from Bremen.

Problem solved
 

Hi,

so here my overdue feedback on the low power problem.
As I wrote I removed the VNT actuator from the turbo link bracket. To get there you only have to remove the lower engine cover and remove a lock pin and three screws holding the VNT housing in place.
I noticed the VNT link bracket moves easily without any friction. That in mind I opend the VNT housing. Therfore you only remove six metal brackets all around the housing.
Here I saw that the worm gear and the partial gearwheel were quite worn (I will upload some pictures later). But due to the direct movement monitoring this wear can be compansated. Replacing the mechanical part of the VNT actuator has no improvement on this problem. Trust me: I did it and spend 140€ for nothing.

Instead the problem was 6 or 8 times in my hand when removing the actuator: In my case it was the VNT actuator connector. One cable - the yellow one - was completly ripped off.

It cost me 15 € and 45 minutes at my repair shop to get it done nice and clean (soldering and superseal connectors). Thereafter everything ran as normal.

Hopefully this helps you with your problem.

Greetings from Bremen!