electronic inccident warning light

Hi, I have just brought a 52 plate Renault Grand Espace "The Race" 2.2dci - with in less than 24 hrs the electronic inccident light flashed up whilst travelling at 65mph, the car then slowed it's self down to 40mph (scary as was in fast moving traffic!) The manual suggests theres a fault with the injectors or immobiliser (I suspect both on mine) Can anyone tell me what the best course of action is to get this fixed? what the probable cause is?



Currently we have to reset the immobiliser everytime we've tried to start it which is quite frankly annoying, we've tried returning the car to where we brought it from but they are no longer returning calls etc (very frustrating)



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Any advice gratefully recieved, Thanks in advance