Scania AMS DTC 4388 NOx sensor at the silencer outlet, short circuit to earth

AMS AMS control unit · Scania

Code 4388 (decimal). Some diagnostic tools show it in hexadecimal as 1124.

In short

The control unit indicates that the voltage supply to the NOx sensor at the silencer outlet T115 is shorted to ground.

Applies to: AMS1

What does Scania AMS fault code 4388 mean?

What causes Scania DTC 4388?

How does the system react?

How to fix Scania AMS fault code 4388?

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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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