What is the reason for the BYD S6 not starting but with normal power supply?

[LouisRose]

No response during startup is generally caused by three reasons: 1. Engine issues: Assuming the starter can work normally, but the vehicle cannot start, this indicates that there are problems with other components such as the engine. If you keep trying to start the car at this time, it is easy to drain the battery, and continuous attempts to start are also very bad for the starter. 2. Battery depletion: If you find that the starter is not working properly when trying to start, it is very likely that the battery is already depleted. Continuously trying to start the car at this time will cause damage to the vehicle's battery, or even lead to battery failure. 3. Starter motor burnout: You can check in the following way. Put the key in the ignition position, check whether the dashboard is powered, or you can turn on the air conditioner.

[DeAlex]

From my experience, the BYD S6 not starting but with lights on can have many causes. First, check the starter—its solenoid switch is prone to sticking or aging. Then there's the anti-theft system; if the key signal isn't detected, it locks the engine. Also, the starter relay could be faulty, directly cutting off the current. Some drivers forget to press the brake or don't shift to P mode, a common issue with automatic transmissions. Loose wiring or corroded battery terminals can cause poor contact. I once advised a friend not to attempt DIY repairs blindly—use a diagnostic tool to read fault codes or try push-starting. For safety, head to a repair shop immediately; don't delay, as it wastes time and risks further issues.

[ElianaLee]

My S6 had a similar issue before - power was fine but no sound when starting. Initially suspected the battery, but it turned out to be a blown starter fuse which was fixed by replacement; The anti-theft lock occasionally acts up - try holding the key near the ignition button for a few seconds to unlock. Relay failures are common - you can open it yourself to check for burnt contact marks. Make sure the gear is in P position and the brake is fully depressed. This reminds me to regularly inspect wiring harness connection points to prevent aging fractures; Having a mechanic scan the ECU with diagnostic tools is more reliable for troubleshooting.

[SanIan]

Hey, stay calm. First, check the remote key battery and see if the anti-theft system responds. Then, inspect the starter fuse in the fuse box and test its continuity. Next, tap the starter to see if there's any response—it might be stuck. For automatic transmissions, ensure the gear is in P position and the brake pedal is firmly pressed. Faulty ignition switches are common. Troubleshoot step by step: key, fuse, motor, and wiring connections. If you can't fix it, head to a professional shop for repairs—it saves time and gives peace of mind.

[SanAmelia]

Starting failure but power supply is normal, I noticed the anti-theft system is the culprit, automatically locking the engine to prevent theft. Misoperations such as low key battery or repeated ignition attempts can trigger it; safety measures include ensuring the vehicle is stationary and the neutral switch is functioning properly. Wiring issues or control unit disconnection can also cause no response. I would recommend finding a technician to diagnose with specialized tools, avoiding self-disassembly that may damage the vehicle; timely resolution ensures driving safety.

[MarleyMarie]

In my opinion, the issue with the BYD S6 stems from a malfunctioning starter solenoid, relay failure, or a fault in the anti-theft ECU. A normal power supply indicates the battery is fine; an insensitive gear switch or a short circuit in the ignition button can also trigger this. For prevention, listen for sounds: a clicking noise indicates the relay is active, while silence suggests an open circuit. Regular maintenance, such as checking and securing wire harnesses, can reduce risks. Ultimately, taking it to a 4S store for computer testing is efficient—avoid tampering to save trouble.