Scania AMS DTC 8423 Reductant circuit, high pressure

AMS AMS control unit · Scania

Code 8423 (decimal). Some diagnostic tools show it in hexadecimal as 0020E7.

In short

The reductant pressure has been higher than allowed for too long.

Applies to: AMS2

What does Scania AMS fault code 8423 mean?

What causes Scania DTC 8423?

How to fix Scania AMS fault code 8423?

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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.