In many cases, this specific code is a "ghost code" that does not trigger a check engine light or dashboard warning. However, if active, it may result in: Audio Issues
The diagnostic trouble code (DTC) for 2021 models typically indicates an issue with the Engine Speed Input signal within the Audio Amplifier Module (AAM) . Specifically, the "-11" suffix identifies a circuit short to ground . Understanding the B1D9F-11 Code land rover b1d9f11 2021