Vauxhall Signum turbo problem

Car: Vauxhall Signum
Model Year: 2004
Categories: Running Rough, Starting & Power Loss
the new problem i have is it seems like the turbo has just stopped working, the engine managment light comes on when the engine is under pressure i.e going uphill in 5th gear and the engine loses power untill i reset the ignition.
the other problem is the engine seems to of lost its turbo power

Been told Turbo Boost Pressure Fault Turbo Fault

Please Help
Posted: Jun 16, 2010 (14 years ago)
You don't say what size / type engine i.e petrol or diesel .Any way doesn't really matter just now , check all hoses / pipes for splits which is common fault .
Posted Jun 16, 2010 (14 years ago)
car is a 2.ltr DTI, just been given a fault code of PO234 any ideas
Posted Jun 17, 2010 (14 years ago)
Answered your other post re code .
Posted Jun 17, 2010 (14 years ago)
check all the vacuum pipes going to turbo wastegate and throttle and swirl flaps,check the wiring plugs going onto egr valve and also check that the inlet manifold and egr are not coked up,this is quite common at high mileage
Posted Jun 17, 2010 (14 years ago)
Really am hoping some one can help with my problem also, i have a 3.0 v6 ctdi and my problem was the turbo broke with black smoke coming out the back, i had the turbo replaced and it now drives.
When i drive the car the engine mangment light comes on and i lose all my boost when the engine under pressure also.

i have changed the boost sensor and checked all hosses, checked egr and its ok, when pluged in its faulting on low boost, dont get it?
All wires have been tested also so not sure what to do next Help!!!
Posted Sep 28, 2012 (12 years ago)

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