Applies to: OPC4 (RET)OPC5 (RET2)
What does Scania RET fault code 22000 mean?
Voltage too high between ground and circuit.
What causes Scania DTC 22000?
Open circuit or short circuit to the 30-supply on temperature sensor circuit.
How does the system react?
Retarder braking is not possible. Yellow retarder warning is displayed in the instrument cluster. When this fault code is generated, the retarder will not work until the control unit has been restarted. Restart the control unit by turning the key to the lock position or radio position and then to the drive position, thereby switching on the electrical system.
How to fix Scania RET fault code 22000?
Check the temperature sensor and its harness-to-harness connectors and cable harness.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.