My FL2 has been a bit poorly this week throwing error messages and reduced power;

I got the errors read off today, they are;

P0087 - Upper signal amplitude too high
P0087 - Lower signal amplitude too low X2

this I hope to have fixed with a new fuel filter, as I do not know when this was last done.

also appearing was;

U1A4C - Parking brake Transportation mode - anone got an idea what this is about ?
U0140 - Airbag Communication with Body control - the airbag light was not on so I am unsure what this is.

Chris MY13 HSE Lux Santorini Black Gone
MY11 HSE Santorini Black Gone
MY08 SE Blue, Gone
Alfa Romeo GT Gone
Alfa Romeo 156 Space wagon Gone
Volvo V40 Gone
Volvo 480ES Gone
VW Sirocco GTX Gone

U0140-00
Lost Communication With Body Control Module - No sub type information
Lost communication with body control module

U1A4C-00
Build / End of Line mode Active - No sub type information
Error/mismatch in car configuration file

You really need to obtain the last 2 digits you have missing from the code to define which module is playing up.
Both codes could be something as simple as a seat mode needing reseating.

example fix from manual for U1A4C-00
Using the manufacturer approved diagnostic system check and up-date the car configuration file as required.
Clear the DTC and re-test
Check and install a new seat control module.
Refer to the warranty policy and procedures manual, or determine if any prior approval programme is in operation, prior to the installation of a new module/ component FL2 XS SD4 Auto 2010 2012-2017 (21k - 91k miles) (MY2011)
FL2 Metropolis SD4 Auto 2014 2017- (16k - 77k+ miles) (MY2015)
Metro in its 11th Year of (Extended) LR Warranty / Full LR Service History
(Expensive, but Trouble/Worry free - hopefully?)

Thanks for this but I only got the first five characters of the codes. MY13 HSE Lux Santorini Black Gone
MY11 HSE Santorini Black Gone
MY08 SE Blue, Gone
Alfa Romeo GT Gone
Alfa Romeo 156 Space wagon Gone
Volvo V40 Gone
Volvo 480ES Gone
VW Sirocco GTX Gone