Why is the Engine Preheating Light On?

[DelEvelyn]

When starting the engine, the engine preheating indicator light can indicate whether the engine is functioning properly. If the preheating light remains on after the engine has warmed up, it indicates a fault in the engine (such as sensor failure, engine wiring issues, or engine control system malfunctions), and it is necessary to promptly inspect and repair the issue at a service center. Below are some precautions regarding engine preheating: 1. Both electronically controlled diesel engines and direct-injection diesel engines require preheating. 2. There is a time limit for engine preheating. Prolonged idling of the diesel engine not only wastes fuel but also fails to meet environmental standards. 3. Avoid excessive engine starts when the engine is cold. Frequent starts of a diesel engine can increase wear on moving parts, shortening the lifespan of components and the engine. 4. During engine preheating, check for any abnormalities in related components and engine operation. While preheating, monitor the indicator lights on the dashboard for irregularities, listen for unusual engine noises, and observe whether the engine's smoke emission is normal.