Scania EEC DTC 4662 Reductant circuit

EEC Exhaust Emission Control · Scania

Code 4662 (decimal). Some diagnostic tools show it in hexadecimal as 1236.

In short

The reductant heater for reductant hose 1 (H25) has consumed more power than permitted.

Applies to: EEC3

What does Scania EEC fault code 4662 mean?

What causes Scania DTC 4662?

How does the system react?

How to fix Scania EEC fault code 4662?

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.

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

Code 4662 in other Scania systems

Compare code 4662 in every system →