What does engine SPN mean?

[VonEmiliano]

SPN is a fault code display format specified by SAE, indicating excessive water content in the fuel filter. Here is relevant information: 1. Consequences: If water cannot be drained in time, the fuel-water separator should be replaced. If the fault code or warning light persists after replacing the fuel-water separator, it may be caused by a faulty sensor. The vehicle can still be driven but should be taken to the nearest service station for professional computer diagnostic equipment to inspect and repair the affected part. 2. Microprocessor control unit: Generally, vehicles equipped with microprocessor control units have a self-diagnosis system, which can be used to automatically check and monitor the working status of various parts of the drivetrain and control system inside the vehicle.