So I have lost my key and had a locksmith around today to sort the problem. He has said he can’t program the key as the security light on the dash doesn’t come on at all. The old key started the engine, but the new un programmed one only allows it to run for a second before it dies (so assuming the immobiliser itself is working). Does anyone have any ideas what could be stopping this light from coming on? Thinking about it I don’t think I’ve ever seen it on at all, except for very occasionally coming on intermittently on a couple of long journeys.