Scania AMS DTC 4674 Electrically heated reductant hose H28, open circuit or short circuit to high supply voltage

AMS AMS control unit · Scania · 2 variants

Code 4674 (decimal). Some diagnostic tools show it in hexadecimal as 1242.

In short

The control unit for the exhaust gas aftertreatment management system indicates that the pins for the electrically heated reductant hose are short circuited to supply voltage or there is an open circuit.

Variant 1

Applies to: AMS1

What does Scania AMS fault code 4674 mean?

What causes Scania DTC 4674?

How does the system react?

How to fix Scania AMS fault code 4674?

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Variant 2: Electrically heated reductant hose H28, open circuit or short circuited to high supply voltage

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.

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