Land Rover B1d9f11 2021

A software glitch or an internal hardware failure within the physical amplifier itself can mimic an external short-to-ground.

Since “B1” suggests driver side, start by disconnecting the driver’s door module (the connector at the door hinge). Rescan. If code goes away, the issue is in the door (handle light or puddle lamp). If not, move to the overhead console.

Are you noticing any actual or unusual cabin noise?

The technician repaired the wire, cleared the persistent "Permanent" code, and updated the Telematics Control Module (TCU) software to ensure all modules were communicating properly. The Happy Ending

In most 2021 Land Rover models, the amplifier is tucked away in the rear cargo side panels or underneath the front seats.

A known manufacturing issue: the wiring harness for the sunroof and courtesy lights can rub against a sharp metal bracket inside the right-side A-pillar. Over 10,000–15,000 miles, the insulation wears through, causing an intermittent short.