Professional OPC5 & RET2 Transmission Control Module Repair
Specialist OPC5 Repair for Scania HGV Vehicles
We specialise in the repair and regeneration of Scania OPC5 gearbox control units and associated RET2 retarder modules. Our service helps workshops, mobile mechanics and fleet operators restore full transmission and retarder functionality without the cost of complete module replacement.
Minimise downtime. Reduce costs. Restore drivetrain performance.
What Is the OPC5 Control Unit?
The OPC5 control unit manages gearbox operation, gear selection, solenoid valve outputs and communication with GMS, EMS and other CAN network modules. When the unit fails, vehicles may enter limp mode, lose gear selection capability or disable the retarder system.
Our OPC5 Repair & Regeneration Service
- CAN communication fault repair
- Repair of damaged solenoid valve outputs
- Correction of overload and voltage surge damage
- Replacement of failed electronic components
- Full functional bench testing
- Programming and gearbox calibration
- Software updates and system integration
Common OPC5 & RET2 Fault Messages
- “Gearbox Fault” – No gear change, limp mode activation
- “Retarder Fault” – Retarder not responding or uneven braking
- “CAN Communication Fault” – Loss of system communication
- “Retarder Overheat” – Automatic shutdown due to temperature
- “Low Hydraulic Pressure” – Reduced retarder braking force
- “Service Transmission” – Calibration or sensor issues
- “Check Engine” / “System Fault” – Power reduction or emergency mode
Most Common Causes of OPC5 Failure
- CAN bus communication issues
- Electrical overload or short circuits
- Damaged solenoid driver outputs
- Hydraulic retarder system faults
- Transmission overheating
- Power supply instability
Why Repair Instead of Replace?
Replacing an OPC5 or RET2 module can be expensive and require extended downtime. Our repair service provides significant cost savings, faster turnaround, reduced fleet disruption and warranty-backed reliability.
- Lower cost than OEM replacement
- Faster vehicle turnaround
- Reduced off-road time
- Environmentally responsible regeneration
- Warranty included
Technical Overview
- Service Type: OPC5 gearbox ECU repair & regeneration
- Vehicle Range: Scania HGV
- Associated Systems: RET2, GMS, EMS, COO7
- Common Issues: CAN faults, solenoid driver failure, programming errors
- Testing: Bench-tested before dispatch
- Programming & Calibration: Included
- Service Coverage: UK-wide
- Warranty: Included
Frequently Asked Questions
Can OPC5 be repaired instead of replaced?
Yes. Most internal electronic failures can be repaired at component level.
Is gearbox calibration required after repair?
Yes. Full programming and calibration are performed to ensure compatibility.
Contact Us
Contact us today to confirm diagnosis, check compatibility, request trade pricing or arrange secure shipment of your Scania OPC5 control unit.