How to check ESC on a car?

To check the vehicle's ESC system, first observe the status of the ESC warning light on the dashboard. If it remains illuminated after startup or suddenly lights up while driving, try restarting the engine or pressing the ESC switch to confirm whether it's a false alarm. Basic inspections include: ensuring uniform tyre pressure across all four tyres (irregular pressure affects wheel speed sensor signals), verifying brake fluid level meets specifications, and examining wheel speed sensors (typically mounted near wheel hubs) for dirt accumulation or wire damage. Common faults involve wheel speed sensor malfunctions (approximately 45% of cases), lateral acceleration sensor anomalies, or poor electrical connections. For routine maintenance: regularly clear debris around sensors, avoid driving through standing water, and maintain battery voltage between 12V-14V. DIY disassembly may void warranty; professional diagnosis using OEM tools is recommended, particularly for hybrid vehicles requiring more frequent system coordination checks. If initial troubleshooting fails, promptly visit an authorised service centre to ensure driving stability and safety.