Renault Repair Questions? Ask a Mechanic for Answers ASAP
A dirty or broken keycard reader can cause such problems. You could try vacuuming it - sometimes fluff or dust gets trapped inside. Failing that it's time to remove the reader unit out and either get it repaired or replaced. and there's a microswitch which detects the card position which can stick so once you have the reader out its well worth trying to clean the switch
Also the keys themselves can develop a fault
and this firm have a good reputation for repairing them
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