Scania COO DTC 27 Signals from the starter lock

COO Coordinator · Scania

Code 27 (decimal). Some diagnostic tools show it in hexadecimal as 001B.

In short

The start signal (50) from the starter lock to the coordinator has been active for too long.

Applies to: COO6 (COO6C)

What does Scania COO fault code 27 mean?

What causes Scania DTC 27?

How does the system react?

How to fix Scania COO fault code 27?

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 27 in other Scania systems

Compare code 27 in every system →