Scania ACC DTC 41221 Climate control unit E17 communication error

ACC Automatic Climate Control · Scania

Code 41221 (decimal). Some diagnostic tools show it in hexadecimal as A105.

In short

The climate system has not received a signal from EMU within an expected time period while the engine is running.

Applies to: ACC3

What does Scania ACC fault code 41221 mean?

What causes Scania DTC 41221?

How does the system react?

How to fix Scania ACC fault code 41221?

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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 41221 in other Scania systems