Hello
Having cleared all the codes on my car when I bought it I have checked again and found a few codes that I cannot find any information.
I don't think any are important but just thought it worth a check

Headlamp Power Module, B1D66 and 67

Vehicle Config Parameter U1A03
U2003 Fibre Optic com bus

Remote Driver Utility Module B1A00 control module

Traffic Message Channel Module B1A56 Seat Slide Control Relay

Light Check Module - No Comms

All as reported by my icarsoft i930, I am not aware of any issues with the car related to any of these code, eg headlamps work just fine and I get traffic messages, so not a big issue but I would just prefer to have no errors.

Thanks
David Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours

hello everyone, i don't like bumping a post but here goes just in case those who know missed my original post.

Does anyone know anything about these error codes?

many thanks
david Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours

The codes look like you have a comms issue somewhere on the bus as you can not communicate with several modules. The problem is could be a break in the fibre network somewhere or a number of other things, Start by checking the easy areas like the modules in the boot for any damage to cables.

Hi Lighthouse many thanks for responding, your reply got me into more research...

The headlamp control module issues were most probably caused when the battery was changed, the manual states that the error is thrown on low and high supply voltage and that the code should be reset.
So research does work, I've had the manual for a while but hadn't got to page 2000 odd as yet.

Remote Driver Utility Module, cleared the codes but they immediately return. 3 occurrences of B1a00 "control module" and one of B1a99 "power on reset".
I cannot find any information on this module, nothing in the manual, so I have decided to ignore for now.

Light check module, cannot communicate so first I will remove a bulb or two to see if it shows an error, if that fails I will get at the module and check the connections. The writeup in the manual is very good.

The above are not on the MOST ring according to the manual. However the rest are, I have cleared the codes and all except the traffic message module seem ok for now. The traffic module is now not communicating but as it works I will ignore for now.

So main message is RTFM from now on before posting. Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours