OBD2 ARDUINO DUE

Hello everyone, I'm new to CAN and I'm using Arduino DUE with a sn65hvd230 and an OBD port like shown in the picture below.

|500x280

The code that I'm implementing is the one on this link on GitHub

https://github.com/togglebit/ArduinoDUE_OBD_FreeRunningCAN/blob/master/Examples/OBD2_29bit_ID/OBD2_29bit_ID.ino

I'm using it on a Citroen C-Elysée but it's not returning any value to my computer. I wanted to know if there is anyone who can help me make it workand if the problem is from the software or the hardware. Thanks in advance