Scania COO DTC 844 CAN communication with switch module

COO Coordinator · Scania · 4 variants

Code 844 (decimal). Some diagnostic tools show it in hexadecimal as 034C.

In short

Fault in communication with the switch module in the steering wheel.

Variant 1

Applies to: COO10 (COO)

What does Scania COO fault code 844 mean?

What causes Scania DTC 844?

How does the system react?

What are the symptoms?

How to fix Scania COO fault code 844?

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Variant 2

Applies to: COO8 (COO)

Variant 3

Applies to: COO9 (COO)

Variant 4

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 844 in other Scania systems

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