FAULT CODE READING
OBD2 codes.
A code identifies a signal or system that needs to be checked, not a part you should replace.
Got an OBD2 Bluetooth adapter? Read the codes straight from your car.0 code entries · 1 related fault
U1121
- System
- Communication network between control units (U)
- Code type
- Manufacturer-specific code: its exact meaning depends on the make.
Related faults in the database
Haldex 5 without communication or all-wheel driveDrivetrain / electronics
- Engine / equipment
- S1: Haldex 5 controller, reference 0AY907554F
- Period mentioned
- Only production periods and VINs documented in the application conditions.
- Symptoms
- Traction warning, absent AWD function and no communication.
- Possible cause described
- Controller failure confirmed through testing; no single internal mechanism published.
- Check for the garage
- Confirm reference; check pump, power and network before testing and repairing controller.
- Cost cited in the source
- No verified quote; confirm part and diagnosis.A rough figure from the original database, not an up-to-date quote.