Scania ALLISON DTC 9861 Control of supply voltage (HSD2) low

ALLISON Allison automatic gearbox · Scania

Code 9861 (decimal). Some diagnostic tools show it in hexadecimal as 2685.

In short

The control unit has detected less than 6 V in two solenoids in the HSD3 circuit.

Applies to: A4

What does Scania ALLISON fault code 9861 mean?

What causes Scania DTC 9861?

How does the system react?

How to fix Scania ALLISON fault code 9861?

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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.