What are the reasons why the BYD door lock cannot open the door?
3 Answers
BYD door lock cannot open the door reasons: Dead battery: If the battery is dead, the car cannot start, and the car's sensing system will naturally fail. In this case, simply recharge the battery. Key fob battery dead: Generally, the battery in the key fob has a lifespan of 2 years. If the battery is dead, you can only use the spare mechanical key inside the key fob to open the door. For vehicles with push-button start, even if you open the door, the car cannot be started if the key fob battery is dead. In this case, simply place the key fob near the sensor and then start the car. It is important to note that the location of the sensor varies for different cars. Before driving, the owner should refer to the vehicle's user manual to understand the sensor location of their specific vehicle.
I've been driving BYD Dynasty series models for many years and have encountered the issue of car door locks not opening quite a few times. The most common cause is the key remote battery running out, which can be easily resolved by replacing it with an inexpensive coin cell battery—low cost and convenient. Another major issue is when the vehicle's battery is dead, often occurring after leaving the car unused for too long; in such cases, the remote won't work, and you'll have to use the physical key to open the door via the lock cylinder. Aging or jammed lock mechanisms are also common, especially after car washes or during humid rainy days when lubricants fail, making it hard to open. Regular maintenance with a bit of lubricant can prevent this. Another possibility is the child lock being accidentally engaged—try using the internal door release button. For safety, avoid forcibly pulling the door handle to prevent paint damage. When traveling long distances, it's wise to keep emergency tools in the trunk, such as a small pry bar, which can be invaluable in critical moments.
Those frequently involved in car maintenance are well aware that BYD door lock malfunctions are primarily caused by several key factors. Battery issues top the list, such as insufficient remote key battery power or low vehicle battery voltage leading to signal transmission failure—replace batteries when needed. Mechanical failures like jammed internal gears in the lock mechanism or burnt-out motors often occur after repeated unsuccessful unlocking attempts, requiring disassembly inspection or professional repair. Electronic interference is another major culprit, with remote signals disrupted by devices like phones or power banks rendering them ineffective. Additionally, false activation of the anti-theft module may lock doors, necessitating reprogramming. For daily use, keeping a physical spare key is advised. In emergencies, disconnecting the battery's negative terminal for a few minutes before reconnecting often resolves the issue. To avoid these hassles, opt for high-quality replacement parts during installations.
