Renault Clio Dashboard Warning Lights and Symbols Engine coolant light. The engine coolant temperature warning light illuminates for a few seconds as the Clio ignition is turned on and then goes out. If light flashes, it indicates a problem with the injection system. Stop as soon as safely possible and contact approved Renault dealer. If the light is steady, allow the engine to idle to cool down. Renault Clio Dashboard Warning Lights and Symbols Renault Clio engine coolant temperature warning light The stop warning light illuminates initially with the ignition and extinguishes once the engine has started. The light illuminate alongside other warnings and messages and is accompanied by an audible sound.