Variant 1
Applies to: COO10 (COO)
What does Scania COO fault code 521 mean?
What causes Scania DTC 521?
How does the system react?
What are the symptoms?
How to fix Scania COO fault code 521?
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Variant 2: Ordinary brake pedal sensor, short circuit to earth or open circuit
Applies to: COO11 (COO)
Variant 3
Applies to: COO8 (COO)
Variant 4
Applies to: COO9 (COO)
Variant 5
Applies to: COO7
Variant 6
Applies to: COO8
This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.
Code 521 in other Scania systems
- 521hex 0209 Orange CAN bus
- 521hex 0209 Orange CAN bus
- 521hex 0209 Micro switch rear door passenger side (truck)/micro switch A4 (bus), short circuit
- 521hex 0209 Communication fault, CAN bus for expansion units
- 521hex 0209 Control unit
- 521hex 0209 CAN communication
- 521hex 0209 LIN bus 1, no communication
- 521hex 0209 TCC control unit, communication is missing with LIN bus 1
- 521hex 0209 The clutch pedal position cannot be read
- 521hex 0209 Output signal