Scania AMS DTC 4665 Electrically heated reductant hose H27, for high consumption

AMS AMS control unit · Scania · 2 variants

Code 4665 (decimal). Some diagnostic tools show it in hexadecimal as 1239.

In short

The electrically heated reductant hose has consumed more power than permitted.

Variant 1

Applies to: AMS1

What does Scania AMS fault code 4665 mean?

What causes Scania DTC 4665?

How does the system react?

How to fix Scania AMS fault code 4665?

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Variant 2: Electrically heated reductant hose H27, consumption too high

Applies to: AMS2

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

Code 4665 in other Scania systems