Scania EMS DTC 9986 NOx sensor T131 downstream of the particulate filter, value too high

EMS Engine Management System · Scania

Code 9986 (decimal). Some diagnostic tools show it in hexadecimal as 002702.

In short

The NOx value downstream of the particle filter is higher than expected.

Applies to: EMS10

What does Scania EMS fault code 9986 mean?

What causes Scania DTC 9986?

How to fix Scania EMS fault code 9986?

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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.