Variant 1
Applies to: OPC4
What does Scania OPC fault code 14120 mean?
Prohibited voltage in circuit.
What causes Scania DTC 14120?
Open circuit in range mode analogue sensor circuit.
How does the system react?
No gear changing possible. The system maintains the current gear and on the first attempt to change gear the system locks in neutral.
How to fix Scania OPC fault code 14120?
Check the sensor and its harness-to-harness connectors and cable harness.
Variant 2
Applies to: OPC5 (OPC5 ECA)
Detection
Prohibited voltage in circuit.
Possible cause
Open circuit in range mode analogue sensor circuit.
System reaction
No gear changing possible. The system maintains the current gear and on the first attempt to change gear the system locks in neutral.
How to fix
Check the 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.