Once it pluged in and someone has turned the key the ECU is locked to the car fastchip are the only people who can unlock it even Renault clip laptops cannot do it. Renault themselves say not to fiddle about. Before you think of any fixes once the key has been tuned with the new ECU it copies the same key that the UCH and car keys have and will only start if these codes match again.Danlp6 said:how isit locked?