DTC U0122: F-CAN Malfunction (Powertrain Control Module (PCM) - VSA Modulator-Control Unit) (PGM-FI System): General Description

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL). When the powertrain control module (PCM) does not receive the signals via the CAN lines for a set time or more, the PCM detects a malfunction and a DTC is stored.