Scania ALLISON DTC 1840 Incorrect gear ratio on neutral gear

ALLISON Allison automatic gearbox · Scania

Code 1840 (decimal). Some diagnostic tools show it in hexadecimal as 0730.

In short

Contact an Allison dealer.

Applies to: A4

What does Scania ALLISON fault code 1840 mean?

How does the system react?

How to fix Scania ALLISON fault code 1840?

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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.

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