Hello, when you repplaced the egr valve did you clean the carbon from the egr passages?
I'm not sure. I would have to ask themechanic who did the work but I suspect he probably did not. Why?
because the egr passages get clogged with carbon and replacing the egr valve alone doesn't fix the issue. The passageway needs to be cleaned so there is proper flow.
1. Do you think this is what's causing the "check Engine" Light to stay on?
2. Do you think this is what's causing the Anti-Theft Engine Immobilier to blink and the car to shut down?
1. Yes, if the system still senses that the flow in the Egr system is still insufficent then it will continue to turn on the light unitl it is repaired
2. no, it will not cause this issue. this is something totally different. possibly bad immobilizer control unit or key is causing issues, etc.
I'm satisfied with your answer and will accept it regarding the check engine light & the EGR valve. I was hoping you might also be able to provide more insight into the immobilizer issue. If you do think of any additional information regarding the immobilizer that you think might be helpful, I would appreciate it.