Scania COO DTC 812 Rotary switch for differential locks

COO Coordinator · Scania · 5 variants

Code 812 (decimal). Some diagnostic tools show it in hexadecimal as 032C.

In short

The control unit interprets that the rotary switch for differential lock is in an implausible position for the vehicle.

Variant 1

Applies to: COO10 (COO)

What does Scania COO fault code 812 mean?

What causes Scania DTC 812?

How does the system react?

What are the symptoms?

How to fix Scania COO fault code 812?

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: COO11 (COO)

Variant 3

Applies to: COO8 (COO)

Variant 4: Rotary switch for differential lock

Applies to: COO9 (COO)

Variant 5: Rotary switch for differential lock

Applies to: COO8

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

Code 812 in other Scania systems