Why can't BYD's one-button start stop the engine?
3 Answers
Generally, if BYD's one-button start cannot stop the engine, simply shift to P gear, restart the engine, and then stop it again to resolve the issue. It is recommended to check the vehicle's user manual, which usually provides explanations. If the problem persists, you can only contact a 4S store for professional assistance. Different models, key detection failure, or battery issues can all cause BYD's one-button start to fail in stopping the engine. Different models have different operations: For example, driving a colleague's car of a different model may require different operations. Some models require a long press to stop the engine, some require two clicks (one to stop the engine and another to cut off all power), while others only need a single click to stop the engine. Key detection failure: Sometimes, strong nearby magnetic fields can cause interference, preventing the key from being detected. Solution: Align the key with the one-button start. Battery issues: Either the battery is dead or its voltage is below 12V. In this case, a long press can stop the engine.
I've encountered this issue before with BYD's one-button start system failing to turn off the engine, which was quite annoying. The most common cause might be a faulty sensor in the brake system, since engine shutdown requires pressing the brake pedal before pushing the button. If the sensor fails to detect the brake signal, the engine won't shut off. Additionally, the one-button start button itself could be stuck or short-circuited, causing no response when pressed. Moreover, electrical system failures like blown fuses or ECU (on-board computer) software bugs can also trigger this situation. Once I even found it was due to extremely low battery voltage causing system instability. To troubleshoot, I first tried pressing the brake pedal multiple times to check if it moves freely, or attempted rebooting the vehicle system (turning off all power and waiting before restarting). If that doesn't work, it's better not to force it - park immediately to check fuses and avoid potential hazards. Prolonged operation in this state may damage the engine, so I recommend visiting a professional repair shop or 4S store for diagnosis ASAP. They can use specialized tools to read trouble codes more reliably. Regular maintenance is crucial to keep sensors and buttons clean, minimizing such issues.
As a DIY car enthusiast, I must say there are quite a few reasons why a BYD vehicle might not shut off with one-button start, with electronic components being the likely culprits. The most common issue is a faulty brake sensor—since the engine requires a brake signal to shut down, a malfunctioning sensor can prevent the engine from responding to the stop command. Another possibility is poor contact or aging wiring in the button interface, rendering the button ineffective. Loose battery connections can also disrupt power stability, affecting the shutdown process. Personally, I've opened the fuse box to inspect relevant fuses for signs of melting or oxidation. I've also tested the relay module to ensure it's functioning properly, as issues in complex electronic systems can be quite elusive. If there's a software bug, such as the ECU freezing, resetting the system (by disconnecting the negative battery cable for a few minutes and reconnecting it) might help—but handle with care to avoid damaging the car by improper wiring. My recommendation is to first use an OBD diagnostic tool to read error codes and quickly pinpoint the problem. If all else fails, take it to an authorized service center for a full scan. Additionally, check for any aftermarket modifications, as installed accessories might interfere with the original system, potentially causing shutdown failures.
