Scania AMS DTC 4420 Communication error, requested urea quantity V231 from EMS

AMS AMS control unit · Scania

Code 4420 (decimal). Some diagnostic tools show it in hexadecimal as 001144.

In short

The EEC control unit has detected an error in the CAN communication from the EMS control unit regarding the requested urea quantity.

Applies to: AMS2

What does Scania AMS fault code 4420 mean?

What causes Scania DTC 4420?

How to fix Scania AMS fault code 4420?

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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 4420 in other Scania systems