What to Do When BYD Surui Cannot Detect the Key?
4 Answers
The solutions for BYD Surui not detecting the key are: 1. Replace the key battery; 2. Check if there is an issue with the anti-theft control unit system; 3. There might be magnetic interference in the surroundings, move the vehicle to another location and try again. The functions of the key are: 1. Close the windows after turning off the engine, the windows will automatically rise and close; 2. Convenient for finding the car in parking lots; 3. Automatically open the trunk; 4. Remote window opening. Taking the 2018 BYD Surui as an example, it is a compact car with body dimensions of: length 4680mm, width 1765mm, height 1490mm, a wheelbase of 2660mm, and a body weight of 1330kg.
When I previously drove a BYD Surui, I encountered the issue of the key not being detected, which is quite common due to low battery power in the key. I tried several times, starting with the simplest methods: checking if the key was too far from the vehicle or if there was any metal interference affecting the signal, then taking out the key to manually start the vehicle, which could temporarily solve the problem. If that didn’t work, I’d try replacing the key battery—usually a CR2032 model, which can be bought at a supermarket. Also, do you have a spare key? Try starting the car with that to see if it works. If it still doesn’t, the vehicle’s battery might be low on charge; try jump-starting the car with a power bank for a few minutes—sometimes that helps. Oh, and interference sources like phones or other electronic devices near the key area can also affect it, so try moving them away. If none of these work, take it to a 4S shop or a professional repair shop and let them use a diagnostic tool to check for system faults—don’t try to dismantle it yourself to avoid damage. Also, remember not to leave the key in damp places and replace the battery every six months as a preventive measure.
As a hands-on enthusiast, I have some experience dealing with BYD Surui key issues. The key is understanding how the key works: it communicates with the vehicle via wireless signals. First, check the key battery by measuring its voltage or replacing it with a new one. If the signal light flashes normally, the issue is likely on the vehicle side. Possible faults include the antenna receiver malfunctioning—open the car's fuse box and inspect the relevant fuses for any blown ones. Alternatively, insufficient voltage from the car battery can cause system abnormalities; use a multimeter to check the battery health—if it's below 12.5V, recharge it. Interference issues are common in underground parking lots or areas with strong magnetic fields; try starting the car in a different location. DIY solutions: remove the key battery for a few minutes to reset the system, or disconnect the car battery's negative terminal for 5 minutes before reconnecting to clear software errors. If the problem persists, consider visiting a repair shop to scan the ECU for potential firmware updates. With the right tools, this process can be both fun and cost-effective.
Don't panic if your BYD Surui key fails - safety first. With years of driving experience, I know this issue can occur suddenly due to signal interference or dead battery. Immediately pull over and don't continue driving to avoid accidents. Try relocking and unlocking the vehicle - sometimes the system just needs recognition. Check the key battery as low power is a common cause; test start with the spare key. Environmental factors like strong electromagnetic fields nearby may cause interference, so try operating in an open area. If these don't work, don't attempt DIY repairs - promptly contact a 4S shop for towing and professional maintenance to prevent affecting other electronic systems. Regular maintenance can help prevent such issues.
