Scania ALLISON DTC 1843 Incorrect gear ratio on 3rd gear

ALLISON Allison automatic gearbox · Scania

Code 1843 (decimal). Some diagnostic tools show it in hexadecimal as 0733.

In short

Actual 3rd gear ratio does not agree with the calculated 3rd gear ratio.

Applies to: A4

What does Scania ALLISON fault code 1843 mean?

What causes Scania DTC 1843?

How does the system react?

How to fix Scania ALLISON fault code 1843?

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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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