What is a coil warning light on an vivaro van?

The coil warning light on a Vivaro van indicates an issue with the vehicle's glow plug system, which is essential for starting a diesel engine, particularly in cold conditions. When this light illuminates, it may signal that the glow plugs are malfunctioning or require replacement. Additionally, it could indicate a broader issue with the engine management system. If the light remains on or flashes, it's advisable to have the vehicle diagnosed by a professional.