How to solve the BYD ESP system malfunction?
3 Answers
BYD ESP system malfunction is usually caused by throttle failure. It is recommended to check for any foreign objects inside the throttle, ensure the connector is functioning properly, and use a computer to read whether the throttle opening is normal. Below is an introduction about ESP: 1. ESP stands for Electronic Stability Program, which integrates three systems: ABS (Anti-lock Braking System), BAS (Brake Assist System), and ASR (Acceleration Slip Regulation System). Therefore, it is necessary to use a diagnostic tool to read the fault code and then handle it specifically based on the fault code. 2. ESP is mainly used to address the risk of tailspin and loss of control caused by continuous steering during emergency obstacle avoidance. When avoiding obstacles in an emergency, ESP intervenes to increase the driving force of the drive wheels; when there is a tendency for tailspin, ESP will brake the opposite wheel to reduce rotation, thereby helping the vehicle follow the driver's steering intention. 3. If the ESP fault indicator light on the dashboard remains lit after the car is started, it may indicate an ESP malfunction. When the ESP light comes on while driving, it is necessary to reduce the driving speed, avoid excessive steering and turning, and find a nearby 4S shop as soon as possible to check the cause.
I once encountered the ESP warning light coming on while driving my BYD, and I was really panicked at that time. The ESP system is a lifesaver, as it helps stabilize the car body during turns and such. I immediately slowed down and pulled over, but even after restarting the car, the issue persisted. I had to drive slowly to my friend's repair shop. He said the most common causes are dirty wheel speed sensors or poor wiring connections, as these components near the wheel hubs are prone to getting covered in mud and water. After removing and cleaning them, the problem was indeed resolved. Since then, I always remind the car wash attendants to rinse the inner side of the wheel hubs thoroughly to avoid unnecessary expenses. If the light remains on after cleaning, it’s likely the sensor needs replacement or there’s a short circuit in the wiring. Never attempt to dismantle it yourself—leave such professional tasks to the experts.
After repairing cars for so many years, BYD's ESP system failures usually boil down to a few common causes. Wheel speed sensor errors are the most frequent—these sensors are located near the wheel bearings, and they often misreport due to mud buildup or damaged magnetic rings. Next are steering angle sensor failures, where misalignment or incorrect angles during full steering lock can throw the system into chaos. Oxidized or loose wiring connections are also regular culprits. The troubleshooting process is standard: first, use a diagnostic tool to read the fault codes and pinpoint the issue, then inspect the sensor's condition and check the wiring continuity, and finally, replace or clean the components as needed. Never skimp on fixing this issue to save money—without ESP assistance during high-speed emergency braking, wheels can lock up, leading to dangerous skids. Safety always comes first.
