Scania EMO DTC 4866 Rotational speed signals, rotational speed sensor T74

EMO EMO control unit · Scania

Code 4866 (decimal). Some diagnostic tools show it in hexadecimal as 1302.

In short

The rotational speed signal from rotational speed sensor T74 is lower than it should be for the current rotational speed.

Applies to: EMO2 (EMS)

What does Scania EMO fault code 4866 mean?

What causes Scania DTC 4866?

What are the symptoms?

How to fix Scania EMO fault code 4866?

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 4866 in other Scania systems

Compare code 4866 in every system →