STM32H7 CAN without Loppback in Zephyr

[vishwasjain]

Hello,

I am having a problem with CAN in the NUCLEO-H753ZI board. I using NXP MCU2551 transceiver and Zephyr RTOS (version 3.4.99).
Problem: I am simply running CAN Loopback example and I can see it working perfectly fine on serial monitor. I can see signals at TX pin (PD1) via signal analyzer/oscilloscope. But when I turn off the Loopback mode in Kconfig file, I can not receive any signal at TX pin and CAN goes into the bus-off mode (which as far as I know happens because of 255 TX-error). I have complete CAN set-up with two nodes and 120ohm as a termination resistor.

Is there something I am missing here?

Thank you.