Applies to: OPC4 (RET)
What does Scania RET fault code 3 mean?
Incorrect or unreliable data.
What causes Scania DTC 3?
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 3?
- If updating of software in the control unit is carried out and fails, try repeating the updating.
- Otherwise clear all fault codes, switch off and re-start the vehicle.
- If the fault codes are still displayed, 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.
Code 3 in other Scania systems
- 3hex 0003 Control unit 1, ACS
- 3hex 000003 Loudspeaker channel 1, break in circuit
- 3hex 0003 Control unit
- 3hex 0003 Voltage supply
- 3hex 0003 Communication with the coordinator
- 3hex 0003 Recirculation motor
- 3hex 0003 Radio controls
- 3hex 0003 Activating the radio
- 3hex 0003 Factory settings are incorrect.
- 3hex 000003 Supply voltage, too low
- 3hex 0003 Control unit
- 3hex 0003 External instrument panel lighting
- 3hex 0003 Voltage supply
- 3hex 0003 Rotational speed sensor
- 3hex 0003 Dipped beam RH.