What is the BYD One-Key Start Failure Case?
3 Answers
The steering wheel will make a "click" sound and lock. The following is an introduction about BYD: 1. Introduction: BYD Company Limited is headquartered at BYD Road, Pingshan New District, Longgang, Shenzhen City, Guangdong Province. 2. Industrial Strength: As a leader in the electric vehicle field and a global leader in the rechargeable battery industry, BYD has quickly mastered the key to the success of electric vehicles - the core technology of power batteries. It already possesses the technology and conditions for large-scale commercialization, enabling the development of more energy-efficient and environmentally friendly electric vehicle products, achieving performance improvements and widespread application.
Once when I was driving my BYD Tang, the one-touch start failed, which was really frustrating. That time before going out, pressing the start button had no response at all, and the dashboard didn't light up either. I was so scared that I thought the battery was completely dead. When the rescue technician arrived, he checked and said the car key battery was depleted. Replacing it with a new coin battery solved the problem immediately. Later, when I went to the 4S store for maintenance, the technician told me there are three common issues: insufficient key battery power, aging or depleted car battery, and interrupted communication between the smart key and the vehicle. If you encounter such a problem, first try placing the key close to the emergency induction area of the start button. Also, a reminder to everyone: don't put the key in a metal phone case, as it can interfere with the signal. The most important thing in daily use is to regularly check the car battery voltage, replace the key battery every two years, and ensure the car is in P gear and doors are properly closed when parking.
After driving the BYD Song Pro for half a year, I encountered a glitch with the one-button start. One morning when heading to work, pressing the button yielded no response—the dashboard lit up but the engine wouldn't turn over. I quickly checked the manual and found that it might be a brake switch issue—the system refuses to start if the brake isn't fully depressed. Trying again with a firm press on the brake pedal, the engine started as expected. Later, the mechanic mentioned that this model has several common trouble spots: poor contact in the control module wiring harness, sticky start buttons, or even interference from the phone's wireless charger could be the culprits. He advised keeping spare key batteries at home; if the system suddenly fails, try replacing the battery first. If that doesn't work, avoid tampering with the circuits yourself—professional diagnostic tools are needed to read the fault codes. Also, be extra cautious with the key in rainy weather to prevent moisture damage, as dampness can cause signal disruptions.
