Had a problem for a few days and although I found much very usefull info in these forums - I need some help !
Had the car, a Nov02 2.2 DTi for over 5 years. It's now done 110K with very few problems except for the dreaded spanner coming on - usually in 4th or 5th if I changed up too early. Ignition off / on and it always reset - that is until now.!
On those past occasions, it went into a form of limp mode but was still easily capable of 80mph - just took longer to get there and hills could be slow but as I said, ignition off / on and it cleared anyway.
The new problem kicks in as soon as the engine gets to a normal temperature. It starts from cold first time even in the very cold weather and runs well for about 4 - 5 miles - then the spanner and into limp mode.
I should say, the engine management light never lights (except with ignition on at start-up) so I haven't tried to read the codes - any point ?
Limp mode now is like running on 3 cylinders - difficult in first gear and right up to 4th - not needed 5th !
Today after studying the excellent "How to", I spent some hours on it - cleaned the EGR valve (fairly coked but not too difficult to remove from inlet manifold), throttle body and boost sensor (both covered in oily soot).
The butterfly moves fine with no sticking (no position sensor on this car). Checked all the vac pipes and the big air hoses on top of the engine and back up to the throttle body.
Rebuilt it and took it out for a drive and it was definately faster / smoother until at 4 - 5 miles - on came the spanner and I struggled home.
I'm pretty sure that something happens when the engine warms up - anybody know anything about the engine management logic ?
It's like something is not being done or checked until a given temperature.
Much appreciate any advice.