Scania DCU DTC 1856 Control unit current is too high

DCU DCU control unit · Scania

Code 1856 (decimal). Some diagnostic tools show it in hexadecimal as 0740.

In short

The control unit has interpreted that the current strength from power supply pin groups V1, V2 and V3 has exceeded the limit of 30 A for longer than 5 seconds.

Applies to: DCU3 (DCUA)DCU3 (DCUF)DCU3 (DCUM)DCU3 (DCUR)

What does Scania DCU fault code 1856 mean?

What causes Scania DTC 1856?

What are the symptoms?

How to fix Scania DCU fault code 1856?

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This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

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