The problem at long last solved by vauxhall dealer at a very good price and they are updating vauxhall HQ data as this seems to be a regular problem on some vectra o4 spec cars.
hope this info may help some members out guys.
This took over 4 days to solve at vauxhall and they never charged me for the labour costs amazing service guys at cheltenham branch.
The total cost for repair was £340.00 but it could of been a lot worse trust me.
fault read cost £70 no fault was found so this was the following that happened guys due to some members having the same problem!!!!!!!!!
emmision light coming on or going off at random, sometime going in safe mode sometimes not.
cam sensor was changed first (same problem)
wire check on the car this took two hours (same problem)
crank sensor changed (same problem)
air con sensor changed in the left side of engine (same problem)
a new engine management system emu (same problem)
unfortuntly all original parts were put back on, at this rate i thought i might end up with a new car.
then a guy said check the cam pully to the crank shaft and bingo the problem was found, the pully had slightly damaged the teeth on the crank so a metal liquid repair was carried out on the crank shaft.
This vauxhall engineer informed me this seems to be happening alot on the early vectras so watch this space.
i hope they reply to the problem like the handbrake issue you never know?
So guys instead of going through all the hassel i had with my car maybe a check to the lower cam on your engine first you might have the same problem!!!!!!!
This may of worked loss or worst problem damage the crank
i hope this info may help some members.
if you want vauxhall to stripe the engine down and fit a new crank this could set you back a cool £2500
other option is to change the engine at a independent garage this would set you back about £400 - £500 but thats not including the cost of a good second hand engine
or the cheap option is to have a liquid metal repair to the crank but you never know how long this might last !!!!!!!
hope this helps members out on here sorry if it does not please remember every car is different but this might be another regular fault that vauxhall should know about !!!!!!!!!!!!