Scania ZF DTC 4621 Drive mode selector

ZF ZF gearbox · Scania

Code 4621 (decimal). Some diagnostic tools show it in hexadecimal as 120D.

In short

Faulty signal from the drive mode selector.

Applies to: ZF1

What does Scania ZF fault code 4621 mean?

What causes Scania DTC 4621?

How does the system react?

How to fix Scania ZF fault code 4621?

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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 4621 in other Scania systems