Scania EMS DTC 4177 Emissions of nitrogen oxides (NOx)

EMS Engine Management System · Scania · 3 variants

Code 4177 (decimal). Some diagnostic tools show it in hexadecimal as 1051.

In short

More than a couple of hours have passed with too low an exhaust gas temperature.

Variant 1: Critically high level of hydrocarbons in the exhaust gas after-treatment management system, engine is still running

Applies to: EMS10

What does Scania EMS fault code 4177 mean?

What causes Scania DTC 4177?

What are the symptoms?

How to fix Scania EMS fault code 4177?

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: EMS S6

Variant 3: High hydrocarbon content in the aftertreatment system

Applies to: EMS S8

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

Code 4177 in other Scania systems

Compare code 4177 in every system →