Scania ALLISON DTC 49809 Lost communication with drive mode selector 2

ALLISON Allison automatic gearbox · Scania

Code 49809 (decimal). Some diagnostic tools show it in hexadecimal as C291.

In short

The control unit has not received a message from the secondary drive mode selector for a specific period of time.

Applies to: A4

What does Scania ALLISON fault code 49809 mean?

What causes Scania DTC 49809?

How does the system react?

How to fix Scania ALLISON fault code 49809?

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