Scania RET DTC 20030 Control unit

RET Retarder · Scania

Code 20030 (decimal). Some diagnostic tools show it in hexadecimal as 4E3E.

In short

Incorrect or unreliable data.

Applies to: OPC4 (RET)OPC5 (RET2)

What does Scania RET fault code 20030 mean?

Incorrect or unreliable data.

What causes Scania DTC 20030?

Incorrect configuration or internal fault.

How does the system react?

Retarder braking is not possible. Yellow retarder warning is displayed in the instrument cluster.

How to fix Scania RET fault code 20030?

  1. First try restarting the control unit.
  2. Spare parts program the control unit using SDP3.
  3. Renew the control unit if this does not help.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 20030 in other Scania systems