Scania EMS DTC 43552 NOx sensor downstream of the catalytic converter

EMS Engine Management System · Scania

Code 43552 (decimal). Some diagnostic tools show it in hexadecimal as AA20.

In short

The quantity of nitrogen oxides measured differs from what it should be.

Applies to: EMS S6

What does Scania EMS fault code 43552 mean?

What causes Scania DTC 43552?

How to fix Scania EMS fault code 43552?

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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.

Code 43552 in other Scania systems