2004 Vauxhall Vectra

Engine Mechanical problem
2004 Vauxhall Vectra 4 cyl Front Wheel Drive Manual 122000 miles

my car was recently diagnosed with fault code po234 turbo overboost condition I have been told to replace turbo solonoid valve. I have tested all the pipes and they are fine no cracks in any of them the car goes into safe mode wont rev over 2500 rpm has any 1 had a similar problem and was it cured with the turbo solonoid valve others have told me it could be the maff sensor I dont wont to replace parts that I dont need replacing. The turbo itself is new and has already cost me a fortune
May 5, 2010.

Hi there,

This valve operates what is call the waste gate, the turbo will produce more boost than is required, so at a pre determined pressure the waste gate opens and dumps excess boost pressure into the exhaust, if this is not working you may do some serious damage to the engine, I would have this check asap.


May 5, 2010.