Applies to: OPC4 (RET)OPC5 (RET2)
What does Scania RET fault code 5020 mean?
Incorrect internal reference voltage in the control unit.
What causes Scania DTC 5020?
Electrical fault in the control unit.
How does the system react?
The retarder pressure and temperature sensor is not working reliably.
How to fix Scania RET fault code 5020?
- Clear the fault code.
- If the fault code recurs, renew the control unit.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.