Scania ZF DTC 4921 Fault in the control unit

ZF ZF gearbox · Scania

Code 4921 (decimal). Some diagnostic tools show it in hexadecimal as 1339.

In short

Internal fault in the gearbox control unit.

Applies to: ZF1

What does Scania ZF fault code 4921 mean?

What causes Scania DTC 4921?

How to fix Scania ZF fault code 4921?

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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.