Scania ALM DTC 257 Control unit, low supply voltage

ALM ALM control unit · Scania · 2 variants

Code 257 (decimal). Some diagnostic tools show it in hexadecimal as 0101.

In short

ALM control unit E7 has detected that its supply voltage has fallen below 16 V.

Variant 1

Applies to: ALM1 (ALM)

What does Scania ALM fault code 257 mean?

What causes Scania DTC 257?

What are the symptoms?

How to fix Scania ALM fault code 257?

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Variant 2

Applies to: ALM1

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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