Applies to: APS1
What does Scania APS fault code 128 mean?
The supply voltage to the control unit has exceeded 30 volts.
What causes Scania DTC 128?
Fault in vehicle power supply system. The fault code can also occur if the vehicle is bump-started or started with starter cables.
How does the system react?
The fault does not affect functionality. The fault code occurs when the voltage has exceeded 30 V for more than 5 seconds. Yellow warning lamp comes on.
How to fix Scania APS fault code 128?
- Check the vehicle's power supply system.
- Clear the fault code.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.