What are the reasons why the BYD S6 won't start?

[DerekAnn]

The following are the reasons why the BYD S6 won't start: Smart key battery dead: The smart key has no power, making it difficult for the in-car sensor to detect it. Gear position: The gear is not in P (Park) position. Steering wheel: The steering wheel is locked. If the car's steering wheel is locked, you can turn the steering wheel left and right while pressing the engine start button to release the tension and unlock the steering wheel. Battery: The battery has insufficient voltage, no power, or is damaged. You can use jumper cables to start the car with another battery. Out of fuel: The car won't start if it's out of fuel. Engine: Engine starting system failure or other reasons may cause this issue.

[DeGrant]

I've been driving for over a decade, including models like the BYD S6, and have encountered starting issues multiple times, summarizing several key points. First is the battery problem, where an aging battery with insufficient charge is most common, and loose or corroded terminals causing poor contact, which is more noticeable in winter or humid weather. The starting system, such as a stuck starter motor gear, could also be the cause, requiring professional inspection. Second is fuel supply, where a malfunctioning fuel pump or clogged filter can cut off fuel supply, especially in cars without regular maintenance. In terms of ignition, carbon buildup on spark plugs or damaged high-voltage coils can prevent ignition, leading to starting failure. There's also sensor malfunctions like false alarms from the crankshaft position sensor locking the car. I believe daily maintenance is most important, regularly testing battery voltage around 12-12.6V and checking spark plug conditions can avoid most problems. In case of emergencies, first listen to the starting sound to diagnose the circuit, then gradually troubleshoot to save time and effort.

[DiKeegan]

As someone who loves DIY car repairs, I often help friends deal with their BYD S6 not starting. The first step is always checking the battery: if the voltage measures below 12V, it might be drained, so try using jumper cables. If the starter doesn't respond, inspect whether the relay or fuse is blown. Next, move to the fuel system—listen for the humming sound of the fuel pump; no sound indicates a faulty pump or wiring issue. For ignition components like spark plugs, use tools to pull them out and test for sparks. No spark suggests a coil or distributor problem. Don’t forget the anti-theft system—a dead key fob battery can lock the engine; replacing the battery or unlocking it can solve the issue. Always prioritize safety when working on your own: wear gloves to avoid electric shocks. Regularly inspect wiring harnesses after car washes to prevent moisture corrosion, which helps reduce failure rates. Tackle simple problems yourself, but leave complex issues to professional mechanics for better efficiency.

[DiLogan]

Failure to start usually has several common causes. A dead battery is the primary culprit; loose terminals or insufficient charge require recharging or jump-starting. Starter failure, such as the motor not turning, may indicate a faulty relay. Insufficient fuel supply from the fuel pump can prevent ignition—check if there’s enough gasoline. Worn-out spark plugs are the most overlooked ignition issue. Sensor malfunctions or anti-theft lockouts can also immobilize the vehicle. Models like the BYD S6 are prone to battery weakening in cold weather, while high summer temperatures accelerate wiring degradation. It’s advisable to first check if dashboard lights illuminate for initial diagnosis. Battery issues are the simplest to address; other cases should be handled by a repair shop early to avoid delays leading to major failures. Regular replacement of consumables is a key preventive measure.