Scania AMS DTC 4385 NOx sensor downstream of particulate filter, short circuit to earth

AMS AMS control unit · Scania · 2 variants

Code 4385 (decimal). Some diagnostic tools show it in hexadecimal as 1121.

In short

The control unit indicates that the voltage supply to NOx sensor T131 downstream of the particulate filter is short circuited to earth.

Variant 1

Applies to: AMS1

What does Scania AMS fault code 4385 mean?

What causes Scania DTC 4385?

How does the system react?

How to fix Scania AMS fault code 4385?

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Variant 2: NOx sensor T131, short circuit to earth

Applies to: AMS2

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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