The engine might only start after several attempts or after pressing the start button multiple times.
On many modern Renault vehicles (Laguna, Scenic, Espace), DF417 points to an internal electrical fault in the hands-free card reader . This is a frequent culprit when the car fails to recognise the key card, preventing the engine from starting. Common Symptoms renault df417
If the code is coming from the transmission module, use a multimeter to check the resistance of the Gearbox Acceleration Sensor . A reading outside of manufacturer tolerances indicates the sensor needs replacement. The engine might only start after several attempts