Scania AMS DTC 4370 Reductant pump, open circuit or short circuit

AMS AMS control unit · Scania · 2 variants

Code 4370 (decimal). Some diagnostic tools show it in hexadecimal as 1112.

In short

The control unit for EEC exhaust gas aftertreatment does not receive a signal from the reductant pump about the current rotational speed.

Variant 1

Applies to: AMS1

What does Scania AMS fault code 4370 mean?

What causes Scania DTC 4370?

How to fix Scania AMS fault code 4370?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included
Get Premium – 7,50 € / month I already have an account

Yearly plan: pay 10 months, get 12. Cancel at any time.

Variant 2

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 4370 in other Scania systems

Compare code 4370 in every system →