The sensor itself may be internally shorted or failed.
Sometimes, the BCM simply dies. Internal components like the TJA1050 CAN transceiver are prone to failure. When the transceiver fails, the BCM goes "deaf" – it cannot transmit or receive messages, leading to a permanent 0x08 error. fiat 0x08
On newer Fiats, CAN bus communication errors can cause the odometer to flash. The sensor itself may be internally shorted or failed