DCU 1840 Scania Control unit current is too high

DCU DCU control unit · Scania

Code 1840 (decimal). Some diagnostic tools show it in hexadecimal as 0730.

In short

The control unit has interpreted that the current strength from power supply pin group V3 has exceeded the limit of 20 A for longer than 5 seconds.

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

What does Scania DCU fault code 1840 mean?

What causes Scania DTC 1840?

What are the symptoms?

How to fix Scania DCU fault code 1840?

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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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