What are the reasons why the Emgrand GL cannot detect the key?
3 Answers
The reasons why the Emgrand GL cannot detect the key are radio wave interference and a dead key battery. Radio wave interference: Frequently placing the key near electronic devices such as mobile phones can cause interference with the low-intensity radio waves inside the key. Dead key battery: If the key exhibits symptoms such as reduced remote control distance or decreased sensitivity, these are signs that the key battery is running low. In this state, the one-button start function will not work properly, and the battery should be replaced as soon as possible. Precautions for the new Emgrand key: Do not place the key near high-power appliances such as televisions or microwaves, as these can reduce the battery life of the remote.
I've also encountered the issue where the Emgrand GL couldn't detect the key, mainly due to a dead key fob battery. Those small button batteries typically last one to two years, and low power results in a signal too weak for the car to receive. Try replacing it with a new battery, such as the CR2032 model—it's super easy and cost-effective to do it yourself. If the problem persists after replacement, the internal chip in the key might be damaged, which often happens if the key is dropped or subjected to pressure. In some cases, environmental interference, like placing the key near a metal cup holder or strong electromagnetic devices (e.g., phones or WiFi), can block the signal. Additionally, issues with the vehicle's own sensor receiver or low car battery can also trigger this problem, especially common in cold weather when the engine struggles to start. It's advisable to regularly check the key fob's battery level, keep a mechanical key as a backup for emergencies, and avoid exposing the key to water to prevent corrosion. During routine maintenance, have a technician test the sensing system to ensure safe and convenient driving.
From a repair perspective, the Emgrand GL's failure to detect the key is often caused by vehicle system malfunctions. For example, a faulty or poorly connected induction receiver (located inside the door handle) can malfunction due to dirt or wear. Low vehicle battery voltage can also disrupt key detection, especially when high-load systems like headlights or AC are running. Another common issue is a blown fuse—check and replace the corresponding component in the engine compartment fuse box. Sometimes, the problem isn’t the key itself but rather the vehicle module needing reprogramming or re-pairing. I recommend owners first check the car battery voltage (dashboard lights indicate normal operation) and test the key in different positions to minimize interference. Avoid haphazard disassembly—visit a professional shop for a diagnostic scan to avoid unnecessary part replacements. For prevention, keep the key dry and park away from high-voltage lines or other strong interference sources.
