Citroen nemo immobiliser problem

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Chuckyegg
Posts: 2
Joined: 19 Feb 2026, 08:07

Citroen nemo immobiliser problem

Unread post by Chuckyegg »

Hi everyone, I need some help to try and fix the immobiliser issue on my nemo 2015 1.3diesel.
U0426 immobiliser code, poor communication from ecu to the bsi unit. I am after the wiring diagram to check the links between the two units before I go down the route of getting them reprogrammed/de-immobilised.
Thanks in advance, any help would be appreciated.
Also: battery checked out fine and earths checked and cleaned from battery to body to gearbox. And key reprogrammed ok 👍
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mickthemaverick
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Posts: 20935
Joined: 11 May 2019, 17:56
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Re: Citroen nemo immobiliser problem

Unread post by mickthemaverick »

I'm afraid I can't help with a diagram as your car is newer than my backup system. However as you have checked the battery and earth connections it is also worth checking the fuses are clean and the connectors are all in good shape around the BSI :)
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
Chuckyegg
Posts: 2
Joined: 19 Feb 2026, 08:07

Re: Citroen nemo immobiliser problem

Unread post by Chuckyegg »

Hi, thanks for the reply, engine bay fuse box checked and cleaned up, will check bsi connections tomorrow 👍