U05A8: The NOx sensor C is sending data that cannot be used
The NOx sensor C is sending data that cannot be used. It is usually that control unit, its power supply or the network wiring.
| Code | U05A8 |
|---|---|
| System | Communication network |
| Group | U05xx, Invalid data between control units |
| Type | Generic: it means the same on every make |
How to read and clear U05A8 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 U05A8 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
- U05A0 The evaporative emission system leak detection control unit is sending data
- U05A3 The AdBlue quality module is sending data that cannot be used
- U05A5 The ammonia sensor is sending data that cannot be used
- U05A6 The AdBlue heater control unit is sending data that cannot be used
- U05AA The intercooler coolant pump is sending data that cannot be used
- U05AC The vehicle thermal management control unit is sending data that cannot be used
- U05B2 The comfort display A is sending data that cannot be used
- U05B3 The comfort display B is sending data that cannot be used
What does code U05A8 mean?
The NOx sensor C is sending data that cannot be used. It is usually that control unit, its power supply or the network wiring.
How do you clear U05A8?
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, U05A8 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.
