2003 Rover 25 1.4 petrol Immobiliser problem???

Rover 25 Problem
The Problem

Immobiliser problem???
Nov 26, 2012 (7 years ago)
Ive not driven my car for a few months due to tax running out, but im going to tax it soon so got in to see if it would start (half expected battery to be flat) but its not, my problem is when i put my key in, the immobiliser alarm sounds, so i press the button on key fob to turn it off, then i turn my key, the engine starts then about 2 sweconds later the immobiliser alarm starts again and cuts the engine out! what could be causing this and can it be fixed or do i just need to get a new immobiliser fitted?

any help would be much appreciated! thanks.

Car details
Car: Rover 25
Variant: 1.4 petrol
Model Year: 2003
Category: Running Rough, Starting & Power Loss

More: Rover 25 Problems
Parts mentioned in this problem
Replies and solutions
Fixes: 1,458
Nov 27, 2012 (7 years ago)
May require the key recoded
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