DTC U0029: F-CAN Malfunction (BUS-OFF (Engine Control Module (ECM)/ Powertrain Control Module (PCM))): 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 engine control module (ECM)/powertrain control module (PCM) does not receive the signals via the CAN lines for a set time or more, the ECM/PCM detects a malfunction and a DTC is stored.