On diesel vehicles, the Glow Plug (or Pre-Heat Plug) warms the combustion chamber to encourage efficient fuel combustion in a diesel engine. The glow plug light naturally illuminates prior to start up and goes out when it’s ready to start the engine. If the glow plug light is on or flashing after the engine is up to temperature it is likely indicating a fault. With the latest diagnostic equipment and expertise, we can assist with all of your vehicle maintenance and diagnostic requirements.
In fact, 80% of replacement glow plug demand occurs between September and March (Source Denso) – Typically when mornings are colder.