Yes. On modern Land Rovers, your front turn signal isn't just a glass bulb with two wires. It’s often a . It contains a tiny circuit board that monitors temperature, voltage, and resistance. It reports back to the main computer: "I am warm. I am blinking. All is well."
: This is the base code. In the Land Rover/Jaguar ecosystem, "B" codes refer to Body systems (e.g., lighting, seats, climate, or battery monitoring). land rover b1d1787