U350B: The control unit input power C fails now and then
The control unit input power C fails now and then. It is usually the part, its wiring or a connector with poor contact.
| Code | U350B |
|---|---|
| System | Communication network |
| Group | U35xx, Communication network |
| Type | Generic: it means the same on every make |
How to read and clear U350B with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see U350B with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- U3507 The control unit input power B fails now and then
- U3508 The control unit input power C gives readings outside the normal range
- U3509 The control unit input power C is below normal
- U350A The control unit input power C is above normal
- U350C The control unit cooling fan has a broken or disconnected wire
- U350D The control unit cooling fan gives a lower signal than normal
- U350E The control unit cooling fan gives a higher signal than normal
- U350F The control unit cooling fan gives readings outside the normal range
What does code U350B mean?
The control unit input power C fails now and then. It is usually the part, its wiring or a connector with poor contact.
How do you clear U350B?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, U350B comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
