What are the reasons why the Changan CX70 key cannot be detected?
2 Answers
Introduction to the reasons why the Changan CX70 key cannot be detected: 1. Dead key battery: When any button on the key is pressed, check if the indicator light turns on. If not, the battery is dead. 2. Poor contact in the car's remote key sensor or key battery: Remove the key casing, rotate the coin battery, or take it out and reinstall it after a while. 3. Signal interference: Electromagnetic or signal interference nearby, such as around cameras, telecommunication towers, or high-voltage lines, may prevent the key from being detected. The issue will resolve once the car moves away from the interference area.
I've been driving for over a decade and have encountered several instances where the key couldn't be detected. Usually, it's just the key battery running out of power, which is cheap to replace. It could also be due to dirt covering the vehicle's sensors or strong interference nearby, such as from high-power electrical appliances or cell towers. Check if the remote function can still lock the doors. If not, it's most likely a battery issue; if it can, then you might need to clean off any dust or stains near the door handle. Last time, after I washed my car, water got into the sensors, causing the same problem—drying them off fixed it. If you can't figure out the cause, the spare mechanical key can serve as an emergency solution. Then, find time to visit a repair shop to check the pairing module to avoid safety issues at night.
