Fault code: EMS 54788 SCANIA

Error identification:

Voltage too low for controlling the solenoid valve for the injection timing to the rear bank, cylinders 4-6.

Cause:

The fault may be due to a battery problem or to a fault on the solenoid valve. It may also be due to an internal fault in the control unit.

Notes:

The maximum torque is reduced by 30% as long as the fault is active.

The engine runs very unevenly if the fuel supply to all cylinders is not working correctly.

Action:

If fault code 5476 has also been generated, rectify the battery problems first.

Check the circuit components, harness-to-harness connectors and electrical cables. Clear the fault code memory, start the engine and rev it up. Check that the engine is running smoothly and reacts normally to the accelerator. If the fault remains, first renew the solenoid valve and then if necessary the control unit.