MasterTuning Fault code dictionary (DTC)

U0037 — Vehicle Communication Bus B

Severity: Serious Can you drive? With caution: limp mode possible, have it checked soon Make: All makes (OBD-II standard)
MeaningVehicle Communication Bus B.
FamilyNetwork (U)

Frequently asked questions

What does code U0037 mean?

Vehicle Communication Bus B. Vehicle Communication Bus B.

Can I keep driving with code U0037 active?

With caution: limp mode possible, have it checked soon

How do you fix code U0037?

Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.

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Where to get it fixed

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