P38 Immobiliser

Is it possible to disconnect or bypass the immobiliser permanently??

Hello mate , don't think you can ...are you having problems???Rob

No starting problems, but where I live I'm happy to do without an immobiliser, especially considering the amount of bother they seem to cause other folk.

As long as you have eka code ,also your hand book which will have the information how to use it if needed your be ok , there are a few other problems that your come across but your get pretty much all of the answers right here as there is vast amounts of info with in this site, and also range rover .net web sit in full of information , so you cant go wrong .
Rob

Yes..Immobilser can be disabled in the BECM settings and is over 95% effective.

For sure. I have mine disabled. Another one of the benefits of having a Faultmate.

There is a setting on Testbook as well which does it too. Although you may, or may not, want to tell your insurance company that you have done it!!

Even if the immobiliser is disabled, the BECM is still looking for the correct code from your keyfob a) when the car is remotely unlocked with the fob, and b) when the key is inserted in the ignition switch, the exciter ring prompts the key to send it's code again to double check against the fob code stored in the BECM.

I don't think T4 can deactivate the immobilser.

You can deactivate the immobiliser, but only the passive. That's the exciter ring that someone else mentioned.

The alarm also causes problems & with the alarm & immobilser deactivated is 100% effective.

You can use your fobs to lock & unlock as well as the key & it allows you to start without any of that engine immobilsed stuff. When that message does display you just have to enter the key into the door lock, turn to lock, then unlock & this will allow you to start.

Does this mean that if the immobiliser is immobilised, my second key, which has knackered circuitry after a severe drowning, can be used again?

With the alarm & immobilser deactivated, yes. You can use the key part purely for key only operation.