P23BB: The NOx sensor heater resistor (bank 1, sensor 3) is not working properly
The NOx sensor heater resistor (bank 1, sensor 3) is not working properly. It may be the sensor itself, its connector or the wiring.
| Code | P23BB |
|---|---|
| System | Engine and transmission |
| Group | P23xx, Ignition coils and engine |
| Type | Generic: it means the same on every make |
How to read and clear P23BB 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 P23BB 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
- P23B7 The NOx sensor heater control (bank 1
- P23B8 The NOx sensor heater detection (bank 1
- P23B9 The NOx sensor heater detection (bank 1
- P23BA The NOx sensor heater detection (bank 1, sensor 3) fails now and then
- P23BC The NOx sensor calibration memory (bank 1, sensor 3) is not working properly
- P23C1 The measuring element of the NOx sensor (bank 1
- P23C3 The engine coolant bypass valve C position sensor has an electrical fault
- P23C4 The engine coolant bypass valve C position sensor gives a lower signal than
- P2300 Ignition coil A primary control circuit low
- P2301 Ignition coil A primary control circuit high
- P2303 Ignition coil B primary control circuit low
- P2304 Ignition coil B primary control circuit high
What does code P23BB mean?
The NOx sensor heater resistor (bank 1, sensor 3) is not working properly. It may be the sensor itself, its connector or the wiring.
How do you clear P23BB?
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, P23BB 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.
