I use another lib for this mcp, cause especially on not so original mcps https://github.com/coryjfowler/MCP_CAN_lib This works more stable. #include <SPI.h> #include <mcp_can.h> #include <mcp_can_dfs.h> #define printf Serial.printf /* tunables */ #define SAMPLES 70 /* how many samples to do on a seq...

Here, who has 6 byte code, CEM from MY2006- and DICE-206751 absoloutly FREE...
Reads your cems complete flash in a few seconds...

https://filetransfer.io/data-package/bsTYjdGO#link