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Discussion Starter #1
Hello again,ive got a turbo boost fault,something about high pressure.

the code is:p0234

does anyone know what the remedy or actual problem could be please.

help a brother out lol :thumb::D
 

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Discussion Starter #4
ive done a bit of self help,and the comments are to take the turbo off and give it a clean.
am i thinking this is the only course of action?
 
D

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The variable vanes in the turbo are stuck in a high boost position.
You could have vacuum problems also. Check the vacuum circuit first.
 

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Discussion Starter #6
cheers david.thanks.

is there anything on here showing a diagram of a 2.0 16v TD?

ive looked everywhere and cant see one
 

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The variable vanes in the turbo are stuck in a high boost position.
You could have vacuum problems also. Check the vacuum circuit first.
Hi, I am new to this site, I have a engine fault code 0246 on my peugeot 806.

Been losing power when going on long journeys, cannot rev past 3000 rpm. It goes back to normal after a few minutes.

not good when you are about to over take, anyone have any ideas please

Regards

Bazza
 

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Hi, I am new to this site, I have a engine fault code 0246 on my peugeot 806.

Been losing power when going on long journeys, cannot rev past 3000 rpm. It goes back to normal after a few minutes.

not good when you are about to over take, anyone have any ideas please

Regards

Bazza


P0246 Turbo pressure regulation electrovalve control : Short-circuit to positive

The above fault basically says that the turbo control solenoid is faulty or there is wiring problem...first thing to do is swap egr solenoid with turbo control solenoid and see if the fault p0264 remains..if so then it has to be wiring or an engine ecu fault.
The turbo control solenoid looks like this.. Pressure converter, turbocharger Peugeot 407 Coupe (6C_) 2.0 HDi from Pierburg - 7.00612.01.0
You should find it bolted onto the bulkhead,the egr control solenoid is normally to the left of the turbo control solenoid on the 806's....:)

Btw...What engine,year is your 806..??
Ron.
 

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Just to echo David Ireland's comment:

Check the vacuum circuit - my 806 was loosing power and going into limp home mode.

There was a tiny tear/hole in the rubber diaphragm that operates the pollution control butterfly valves (aka swirl control actuator).

The leak was enough to loose vacuum such that when the turbo was required there was not enough vacuum left to operate it.
Also on my 806 the cup at the end of the accuator rod had broken too.
I fixed it but still had the power loss until we took the thing apart and discovered the hole.

Took ages to diagnose as all the faults point to elctrical/turbo related problems.

HTH
C.T.
 

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Hi CT,

Many Thanks for the info. I have been told the heat exchanger has got a split? what are the implications with this as the gases leak out from time too time. Could tis fault have something to do with the loss of power?

Regards

Bazza
 

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Peugeot 207 2007

Hi, I have a peugeot 207 diesel and I have had the p0234 fault come up, the aa man has cleared the fault on the car, and said when he looks at the turbo its looks fine. Does anyone know what this could be???
 

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p0234, most of the time it is a problem with the turbo control valve. There is an electric valve that is controlling the turbo with vacuum. Check the electric valve, and the filter where the valve can let escape vacuum. The filter is placed by the diesel injectors, when they leak or leaked the filter can be blocked with dirt.
 

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I just thought I'd add a couple of pictures from my 806 to show the vacuum circuit and the actuator that operates the pollution control butterfly valves (aka swirl control actuator).

There is a massive thread about the swirl actuator in French on forum-peugeot, this page shows the actuator as item 15.
In French they call it "capsule de commande du volet d'air"

This is a new one as a spare part: P1030601.JPG
It has two problems eventually the socket on the end of the actuator arm gets a crack and then snaps. So although the actuator actuates the swirl valve control lever doesn't move.

The other problem is more subtle, over time the actuator diaphragm gets holed and vacuum is lost. Since the holes in the diaphragm are small loss on vacuum is slight and behaviour varies with driving style/mode. As vacuum is lost the other solenoids attached to the same vacuum circuit erroneously show failures. This can show as intermittent EGR failures sending the engine into limp home mode.

This picture highlights it on my 806 HDi: actuator3.JPG

These are the vacuum solenoids connected to the same vacuum circuit: vacuum.JPG

So people start to look at the EGR/turbo for the problem :confused: - when the fault is a few pin prick sized holes in a rubber diaphragm elsewhere. :mad:

HTH
CT
 

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Fault code P0234

Hi,
i'm a newby as well but i've been told that the vacuum pipes could have been removed and replaced incorrectly causing the overboost?
Could anyone confirm this?
 
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