Applies to: EST1 (EST)
What does Scania EST fault code 552 mean?
The supply voltage to the motor pump unit is too high.
What causes Scania DTC 552?
- Fault in cable harness or connections. - Internal fault in the pump motor unit electric motor.
How to fix Scania EST fault code 552?
- Check the cable harness and connections.
- Check that the voltage between signal and ground is approximately 24 volts.
- Check the signal for the motor pump unit supply voltage.
- Compare with the measured value.
- If the difference is greater than 5 V, renew the electric motor in the motor pump unit.
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.
Code 552 in other Scania systems
- 552hex 0228 Micro switch reserved pin (truck)/micro switch A10 (bus), short circuit
- 552hex 0228 Expansion unit, supply voltage
- 552hex 0228 Control unit
- 552hex 0228 Supply voltage [V]
- 552hex 000228 Post injection ontime too long, cylinder 8.
- 552hex 0228 Motor pump unit
- 552hex 0228 Motion sensor in the cab
- 552hex 0228 CAN bus