Nicholas Favell
I thought the ECU coded to the UCH, you can code a new engine ECU to the UCH, but a used ECU will need to be virginised before you can use a 2nd hand unit.
Are you sure its not a UCH (immobilsor) fault? We have replaced several UCH boards on clios. The flashing red light means the engine is immobilised.
Sometimes I have been able to leave the UCH disconnected for 10 minutes or so and then it's been ok.
Keep us updated
Nick
Message Thread 
Renault Clio 1.2 D4F712 2001 - Non start - Fixed # - Steve Shaw May 4, 2016, 10:01 am
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