Low-Speed CAN, also known as fault-tolerant or ISO 11898-3, typically at 50Kbps, but operates at speeds up to 125 kbps. It is designed for less critical systems like body control modules, door locks, window controls, etc., where data transmission speed isn't vital. Its key feature is the ability to continue functioning even when one wire in the bus fails.  (Source)

https://www.iso.org/standard/36055.html

Used for Media / Entertainment / Steering wheel controls.  Opening a Connects2 steering wheel adapter reveals a TJA1055 IC. This CAN bus is present on the Stereo Headunit rear connector and used to provide road speed telemetry, engine status, steering wheel control integration etc.

This low-speed Fault Tolerant CANbus operates on different electrical voltages than the main ODBII port and high speed CANbus. Whilst a high-speed CANbus transceiver can work with the low-speed, it is not advised and could cause unsable CANbus issue with errors and intermittent connectivity. - i can validate from my own experience.

The K-Line is a very low-speed single-wire serial communication system used on many motor vehicles and commercial vehicles. It is commonly used for the diagnostic connections between the Electronic Control Modules (ECMs) on the vehicle and the diagnostic equipment (scan tools and data loggers). The K-Line is a network based upon the ISO9141 specifications, also known as the 9141 California Air Resources Board (CARB) Standard.

The K-Line is very different to a CAN Bus network and from most communication networks in general. A CAN Bus network, for example, does not have either a central or a primary ECM: all the ECMs are equal as they are all able to transmit messages along the network as well as receive messages.

Digging deeper into the wiring diagrams, it can be seen that the main Body System Integration ECU (BSI1), connects through the Body Fuse box (BF00), through a connector (B002) to the Stereo headunit (8410). 

The Wires shown in bold are the B-CAN bus lines and can be physically identified as blue and white twisted pairs.

On the Peugeot Boxer ODB port, there are 2 additional CAN bus pins exposed. 

Pins 1 & 9.

These are connected to the low-speed CAN bus data, for Instrument Cluster/Doors/Windows/Entertainment Headunit etc...

It operates on a 50Kbps datarate.

The canbus data streams, may look un intelligible... but with a bit of analysis, they reveal some usefull insights and lead to the required information.

The WiCAN device can be configured to export the CAN bus data as a live stream using a few protocols.  Using the `SavvyCan` mode  and using the SavvyCan app :
https://github.com/collin80/SavvyCAN

The CAN bus messages are recorded and presented with a variety of tools to allow the analyis.

A simple method, is to do a repeated action whislt recording the data.. then look through the data for the repeated messages - which standout over the backghround noise.

https://www.csselectronics.com/pages/can-bus-sniffer-reverse-engineering#savvycan

Some Examples below:

      #HeadLights_Status

      #0x06214000

      #2nd Byte, Bit Mask : 01101000 (0x68)      

      - can_id: 0x2214000

        use_extended_id: true

        then:

          - lambda: |-

              if (x.size() > 0) {

                // Check if bit 12 is high

                if ((x[1] & 0x68) == 0x68) {

                  id(Headlights_Status).publish_state(true);

                } else {

                  id(Headlights_Status).publish_state(false);

                }

              }

      #HazardLights_Status

      #0x06214000

      #3rd Byte, Bit Mask : 01100000 (0x60)

      - can_id: 0x2214000

        use_extended_id: true

        then:

          - lambda: |-

              if (x.size() > 0) {

                // Check if bits 22 and 23 are high

                if ((x[2] & 0x60) == 0x60) {

                  id(HazardLights_Status).publish_state(true);

                } else {

                  id(HazardLights_Status).publish_state(false);

                }

              }