Originally Posted by Project Focus

You're welcome! Glad my post has been a help for you and resolved the problem with your Galaxy.

The EGR valve just dumps a burst of dirty hot exhaust gases into your nice clean intake manifold at certain throttle situations. The idea is to 'clean up' the emissions and increase fuel economy, what it actually does is cake your inlet manifold in dirty oily carbon deposits, clearly seen on the back of my throttle valve above. The only thing you want going into the intake manifold is clean cold air, so unplugging it will not affect your engine running at all, except your engine warning light will come on, oddly it doesn't come on when the EGR valve is faulty!
I'm assuming it sticks open when the electronic part of the valve opens it and this causes the engine to hesitate and eventually cut out?
I've left mine unplugged for the last couple of years, runs absolutely perfect, passed 2 MOTs emissions are spot on but my engine fault light is on, so really I need to sort it in case another issue brings the warning light on!
So there are a few options-
1. Unplug and ignore the EGR valve, the engine warning light will come on.
2. Replace the EGR valve., no engine warning light but the problem will happen again in the future.
3. Bypass it some way that makes the ECU 'think' it is still working.
I think it looks easy to remove the electronic part of the EGR valve, it's like a solenoid on top of the mechanical part of the EGR valve, maybe something can be done to make the solenoid activate but not open the valve?