So my engine management light is on when I start the car. Car operates and revs fine. I drive but as soon as I stop at a junction it drops into limp mode. If I stop the engine and park for a moment it sometimes works again inediately and sometimes is still in limp mode. Any ideas?
Very Occaisionaly the engine management light will turn off as well. Recently I’ve had the turbo boost pipe replaced as it has come loose and been damaged. I have serviced the EGR system including the valve and cooling pipe (all gaskets replaced).
Your initial symptoms almost sound as though the isn't a solid electrical circuit for all the computers and sensors to function properly. Modern cars are very reliant on the electronics, so is your battery in good condition and do all the power/earths have sound connections?