Why can't the BYD S6 detect the key with one-button start?

[DelConnor]

The reasons why the BYD S6 cannot detect the key with one-button start are as follows: 1. Poor key placement: For example, in the trunk, on the floor inside the car, in the cup holder, in the glove compartment, in the door panel storage box, near the rear parcel shelf, or under the front windshield. If this issue occurs, try placing the key in a visible location within the passenger compartment first. 2. Low key battery: The remote key typically uses a standard button cell battery with a rated operating voltage of around 3.3V, and under normal conditions, its lifespan can reach up to 2 years. 3. Use of a key case: This may weaken or block the signal. 4. Signal interference: Placing the key near devices such as mobile phones, laptops, or power adapters. Since these radio devices emit wireless signals that can interfere with the smart key, keep the key away from such devices when in use. 5. Faulty key chip: This may result in poor or no signal transmission. 6. Malfunction of the in-car oscillator or related components: This prevents the formation of an effective electronic oscillation zone, leading to failure in scanning and recognizing the key. 7. Issues with the antenna in the rear window glass: If the signal cannot be received, check whether the antenna signal amplifier is functioning properly or if window tinting is blocking the signal. 8. Deviation in the vehicle's signal code rate: This requires reloading the matching code between the key and the car.

[McRhett]

I've been driving the BYD S6 for several years and have encountered the issue of the one-button start not detecting the key a few times. The most common reason is usually a dead key fob battery. If you keep the key in your pocket or bag pressed against your phone, the signal can get interfered with. Sometimes, high-voltage power lines or large electrical appliances nearby can also cause strong electromagnetic interference. Additionally, a faulty chip inside the key or a loose vehicle antenna could be the culprit. I suggest first trying to hold the key close to the start button to see if the system recognizes it. If that doesn’t work, replace the CR2032 battery—you can easily open the key’s back cover to do it yourself. If the issue persists, the vehicle’s software might need a reset by disconnecting the battery for a while or taking it to a 4S店 for an antenna check. Avoid staying too long in areas with heavy interference, and pay extra attention to signal issues when parking. Regular maintenance of the key can save you a lot of trouble.

[DiAdam]

As someone who frequently tinkers with cars, I'm quite familiar with keyless start systems. Failure to detect the key is often attributed to low key battery or external signal interference. For example, in shopping mall parking lots with numerous electronic devices around, signals can get blocked. Aged key batteries or malfunctioning vehicle receiver modules are also common culprits. Additionally, the BYD S6's anti-theft system might misjudge and cause communication interruptions. During testing, using a spare key to start the car can help determine if the issue lies with the key itself; without a spare, try the re-pairing process—wait a few minutes after turning off the car before retrying. Common interference sources include phones, smartwatches, and even power banks—avoid carrying them while driving. Simply replace the battery with a new CR2032 model, which is cheap to buy online. If the problem persists after troubleshooting, have the circuitry inspected without delay.

[AugustAnn]

As a BYD S6 owner, I can tell you that key detection failures are mostly due to a drained battery. Simply replacing the small CR2032 coin cell usually solves the issue. Alternatively, poor signal in parking areas, such as near metal structures or microwave interference, might be the culprit—try moving to a different spot. If the key itself is damaged internally, you'll need a replacement, which isn't expensive. Occasionally, the system might freeze; restarting the car's battery for ten seconds can help reconnect. In short, try these simple fixes first. If they don't work, head to the 4S shop for repairs—don't waste too much time on it.

[DelZachary]

Having driven the BYD S6 for many years, the issue of the key not being found with one-button start is commonly caused by a depleted key battery or strong interference environments. For instance, when the key is placed too close to a phone in a bag, the signal can become disrupted. It's advisable to regularly check the key's battery level and replace it with a new one annually as a preventive measure. In high-interference areas like underground parking lots in shopping malls, driving out promptly can restore functionality. If the key chip malfunctions, use the mechanical method to open the door and start the car, or wait for the vehicle system to go into sleep mode before retrying. Long-term neglect may affect the anti-theft function, so ensuring the key is in good condition before departure can save trouble. Safe driving relies on meticulous maintenance.