What are the reasons why BYD cars cannot start?

[DeTimothy]

Insufficient battery voltage, fuel supply system failure, and poor ignition system performance can all cause BYD cars to fail to start. Insufficient battery voltage: Battery failure or excessive discharge can lead to insufficient power, making it unable to drive the starter motor. Under normal circumstances, the starting voltage of the battery should not be lower than 11.45V. If it is below this voltage, the car will not start properly. You can use a multimeter to check the voltage between the battery terminals. If necessary, replace the battery or use jumper cables to start the car. Fuel supply system failure: Blockages in the low-pressure fuel line, loose or leaking pipes, air in the high-pressure fuel line, clogged fuel injectors, or incorrect fuel injection timing can all cause fuel supply system failure. In such cases, there will be insufficient combustible gas in the cylinders, preventing the car from starting. It is necessary to visit a repair facility to systematically check whether all components of the fuel supply system are functioning properly. Poor ignition system performance: The ignition coil and spark plugs in the ignition system are wear-prone parts and usually need to be replaced every 50,000 to 80,000 kilometers. If they are not replaced for a long time, the ignition energy will be insufficient, making it impossible to completely ignite the mixed combustible gas in the cylinders, thus preventing the car from starting. It is necessary to check whether the ignition system components are working properly and replace them if necessary.

[Lena]

Last time I took my BYD out for camping, it wouldn't start, which had me running around in circles. Common causes include a drained battery, such as leaving the lights on leading to power loss, or an old small battery reaching the end of its lifespan; a key fob running out of power causing recognition failure, especially with BYD's smart keys which require extra care; a stuck starter motor preventing the engine from turning over; for hybrid models, issues with the fuel pump or not filling up the tank can also cause problems. In my case, it was corroded battery terminals, which were fixed after cleaning. Regularly check that all electronics are turned off when parking, and test the battery voltage periodically to avoid sudden failures. If you can't handle the issue, call for roadside assistance immediately—safety comes first. BYD's after-sales service is quite reliable and can save you a lot of hassle.

[Lilliana]

After years of car enthusiast experience, here's my analysis of startup failures: First, check if the small battery voltage is below 12V (BYD often uses lithium auxiliary batteries). Suspect the starter motor if there's abnormal noise during operation. No fuel or fuel line blockage (pay attention to hybrids). Blown fuses or burnt relays will cut off the circuit. I usually check voltage with tools and test wire connections - replacing fuses myself is quick and easy. Remember not to tamper with high-voltage systems; it's best to read the manual before DIY or seek professional repair to avoid damaging controllers.

[AshleyDella]

From a new energy perspective, BYD's failure to start is often caused by issues with the 12V auxiliary battery; low charge in the high-voltage battery or a BMS bug that prevents control; software conflicts requiring a reset operation. For certain models, key disconnection is due to anti-theft system anomalies. I suggest trying a reset: disconnect the small battery for a few minutes and then reconnect it. Regular maintenance should focus on updating the small battery and ensuring charging balance, which can significantly reduce troubles. Performing a self-check before long trips adds peace of mind.