OBD2 CODE

U0114 Communication network between control units (U)

We do not have a full sheet for this code yet, with its causes and checks. What you see here comes from the OBD2 code standard.

Name taken from the open OBDex code list (public domain).

What do I do now?

If the engine light flashes, the car loses a lot of power, overheats or the brakes fail, stop somewhere safe and call for assistance.
If the car drives normally, book a garage and show them this code: its exact meaning and the cause depend on each model.
Tell us what you notice: the diagnosis takes the code, your car and the symptoms into account.

This code does not point to the engine, the brakes or the transmission: you will see the X-ray car with no area marked.

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.