V50 Engine 2.0D : Loss of Power, Turbo issues

[vk6093]

Hello there!

I am new here,
My 2008 Volvo V50 2.0D is throwing P0299, P120F, P2263, P0234, P0002

I know that the fuel pressure sensor might be going out, P0002 and P120F show that fuel pressure variance is high and P120F that the AC clutch is going out, I'll be getting a multimeter to check,

My car hadn't had turbo boost for a few years, gave it to diesel specialists, they did something and it ran like a turbocharged rocket, changed probably the actuator on the turbo itself, possibly cleaned the TCV foam filter thing(It looks like a brand new one, and didn't disintegrate when I washed it).

A mechanic also changed the fuel pump as the last one had stranded me in the highway(near a stop) in a very strong limp mode(couldn't rev above 1.8k?).

I do not have a ramp or access to a VIDA/DiCE, what hoses should I check to make sure any vac leaks aren't happening, though one of the codes says that it's giving overboost, which is weird, I'll check if the TCV hoses were properly connected. Later I'll post sensor information.

Thank you for reading, this issue has been plaguing my car for a few years, I've just had enough of it, I'll close the thread out if/when I find what's happening more definitively and post what the issue was to possibly save someone else the headache.

[IainG]

Hi
Any use ?

[vk6093]

Originally Posted by IainG

Hi
Any use ?

Hey! I managed to resurrect the turbo for a little while by reconnecting the vacuum tubes as they had fallen off from the reddish vacuum pump(?) on the front right of the engine, I'll check for more vacuum leaks, and see if the TCV(which I assume is the same thing as a boost control valve) is shut closed.
The provided diagram is very valuable for this, thank you!

I also have a new code for the crankshaft sensor, but I assume that is not the main issue here as it's quite a new code and it appeared after I disconnected and reconnected the fuel pump, so might disappear on its own.

Also there are 3 TCV's??

[IainG]

Hi
There are 3 solenoid valves (on my car at least) one does the turbo boost and the other 2 do flaps on the air intake. I believe some cars only have 2 solenoid valves.
The valves are all the same and are interchangeable.

Might be worth a read

https://www.volvoforums.org.uk/showt...errerid=116256

[vk6093]

Originally Posted by IainG

Hi
There are 3 solenoid valves (on my car at least) one does the turbo boost and the other 2 do flaps on the air intake. I believe some cars only have 2 solenoid valves.
The valves are all the same and are interchangeable.

Might be worth a read

https://www.volvoforums.org.uk/showt...errerid=116256

On my car there are only 2, the throttle body is different from the diagram, I need to clean one of the TCV's that's on the left as it looks like a gray one, but I just think it got gunky, My car boosted to 8psi yesterday, so at least I know the Turbo didn't have a walk.
Therefore I think the leak was vacuum lines being not fully on the nipple on the other TCV that's connected from the vacuum tank.