Hello, @saurabhkulkarni123
The main reason that LIN peripheral could not work is not powering the evk with an external source. Did you power the S32K148 board with an external 12V DC power supply? LIN peripheral is working via SBC UJA113x chip and it needs an external power. To power up the board from the external source, you have to move the J8 jumper to 1-2 and let the default ones.

Also, please keep in mind that for S32K148-EVK, LIN1 instance is connected to the LPUART0 and LIN2 instance is connected to the LPUART2, as depicted below.

So, in order to use J13 pins for LIN1, you have to set inside the LIN configuration block for your model instance 0 and to make sure that pins for LPUART0_Tx and LPUART0_Rx are configured as PTA3 and PTA2, according to schematics.
Hope this will help you!
Let me know if it worked.
Regards,
Stefan.