| P0603 Unidade de comando - Erro interno |
| After a long drive the engine stops and does not start anymore |
| Other CAN bus participants reports communication problems with the ECU |
| Sporadic no communication with control unit possible, depending on the temperature |
| no control to the injectors |
| Engine does not start permanently or sometimes weather-dependent (temperature-sensitive) |
| Electronic fuel pump relay is not switched, engine receives no fuel |
Bosch Electronic Service