Hello all, I have a W reg (2000) 1.8 None-Turbo Passat (B5 I believe)

The head gasket went and pressurised the heating system that caused the heating matrix to blow. My mechanic friend who I have used for years with excellent success took the dash out and changed the heating matrix over and did the head gasket and put everything back together.

The car runs but the immobilizer kicks in after a second and cuts it out.

I had it towed to VW dealer to have the immobilizer sorted as I didn’t have the secret code for the car but VW have since reported that they were unable to communicate with the ECU to re-code it.

They have 3 pages of fault codes from the car, none of them are open circuit codes, they are error state codes. I have talked to a few people and they believe that to be normal after taking the dash out and doing the head gasket. They advised that I clear the codes using vag-com and then run it to see which codes come back up, that seems reasonable enough, I haven’t done that yet as I only got off the phone from VW dealer 2 hours ago.

I do not believe that the VW dealers know their a**e h**e from their elbow, the specialists I have talked to said the error codes are normal after such work has been carried out, before the head gasket went the car ran PERFECTLY and the VW dealership seemed to dwell a lot on the fault code issue that I’ve since been told is normal


The reason for my post:

How do I by-pass the immobilizer?

I’ve spent £800 on a car that’s barely worth twice that, if the water in the passenger footwell had damaged the electronics I’ve been told the alarm and electric windows would go funny, they have not, they are perfectly fine.

If cars such as these can be stolen then car thieves must be able to disable these retched immobilizers, and I feel if they can do it I may be able to do it. The car runs fine but the immobilizer kicks in after a second and cuts it out.

I am at my wits end now, it’s been two weeks since all the trouble started and it’s been in the shop.

Any help greatly and hugely appreciated.

Thanks