What Causes the Failure of Anti-Theft Authentication and Inability to Start the Engine?
2 Answers
Solutions for engine authentication failure and inability to start the engine are as follows: 1. Press and hold the one-touch start button, then press the unlock button: Open the door, sit in the driver's seat, take out the car remote key, and place it close to the one-touch start button for more than 30 seconds. Continue holding the key near the one-touch start button and press the unlock button on the remote key. 2. Try pressing the trunk button: Press it several times or press the lock and trunk buttons a few more times. If multiple attempts still fail to resolve the engine system authentication failure alarm, it is advisable to take the vehicle to a repair shop for inspection. Reasons for engine authentication failure include the following situations: 1. The internal chip of the key is not matched/locked. 2. Faulty anti-theft read coil. 3. Communication failure between the anti-theft coil and the anti-theft control unit. 4. Internal fault in the anti-theft control unit/communication failure with the engine control unit/lack of matching between them. 5. Electromagnetic wave interference, etc.
I've encountered this kind of anti-theft authentication failure preventing the car from starting before. At that time, I was in a hurry to get to work in the parking lot, but the car simply wouldn't start, and the dashboard displayed an anti-theft system lock warning. After some struggle, I realized the issue was with the car key. There's a small chip inside the key that needs to pair with the car's onboard computer for ignition. If the battery is dead, the signal can't be transmitted, and the car naturally can't recognize it. I solved the problem by replacing the battery. However, other common causes include damage to the key chip, such as dropping it on the ground or getting it wet; sometimes, severe environmental interference, like strong electromagnetic fields nearby, can block the signal. Additionally, the car's anti-theft module might be faulty. It's advisable to regularly check the key's condition and replace the battery of keys that have been used for several years early. If the problem persists, don't force-start the car; instead, seek professional diagnosis at a specialized shop promptly.
