Why is the keyless entry not working on the Buick Regal?
2 Answers
Buick Regal keyless entry not working reasons are as follows: 1. Fault diagnosis: After GDS detection, there is a fault code B3119 in the keyless entry control module, indicating that keyless entry antenna 1 has high voltage or is open circuit. The reasons for this fault code include corresponding circuit breakage or open circuit, antenna damage, keyless entry module failure, etc. Press the switch on the left front door handle and observe this data with GOS as inactive (it should normally show active). Press the switch on the left rear door handle, and this data shows as active and normal. 2. Working principle: When the door handle button or trunk touchpad is pressed, the low-frequency antenna sends a verification command to the keyless entry transmitter. Due to the low frequency, the communication range is limited. The antenna will send the verification command within a 1m range, and the transmitter must be within this range to receive the verification command. The transmitter receives this verification command and sends a radio frequency response message, which will be received by the remote door lock receiver. If the response is correct, entry to the vehicle is allowed.
Last time my car had this issue too, took me a while to figure it out. The most common cause is a dead remote key fob battery—just replace it with a new one and you're good to go. If the key light is on but the door still doesn't respond, it might be due to low vehicle battery voltage, in which case you'll need a jump start. Also check the door handle sensor; dust or debris blocking it can cause failure—just wipe it clean. Environmental factors like proximity to phones or Wi-Fi devices can cause strong signal interference, so step away and try again. If none of these work, don't force it—it could be a system software bug requiring a 4S店 reset and reprogram. For safety, always carry a spare key when you're out.
