how old is the car as renault use a number of different systems,older cars require a 4 digit code which you can enter but newer cars ,2001 on use encrypted codes and will need to go to a dealer.
steve
January 2009
go to a garage and ask them to coad read the car from this they can determan if the ecu needs changing or just reprograming but 9/10 renalts need new ecus and programming hope this helps
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Try fixfault.com to fix cars.