Scania ALLISON DTC 1818 RELS, signal incorrectly low

ALLISON Allison automatic gearbox · Scania

Code 1818 (decimal). Some diagnostic tools show it in hexadecimal as 071A.

In short

The control unit is calibrated to receive a RELS signal and detects an acceleration while RELS is active.

Applies to: A4

What does Scania ALLISON fault code 1818 mean?

What causes Scania DTC 1818?

How does the system react?

How to fix Scania ALLISON fault code 1818?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included
Get Premium – 7,50 € / month I already have an account

Yearly plan: pay 10 months, get 12. Cancel at any time.

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

Code 1818 in other Scania systems