Scania AMS DTC 4387 Reductant circuit, high pressure

AMS AMS control unit · Scania

Code 4387 (decimal). Some diagnostic tools show it in hexadecimal as 001123.

In short

The reductant pressure is too high when the reductant pump is shut off​.

Applies to: AMS2

What does Scania AMS fault code 4387 mean?

What causes Scania DTC 4387?

How to fix Scania AMS fault code 4387?

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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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