P2AF0: The intake air lambda sensor negative current control (bank 2) gives a lower
The intake air lambda sensor negative current control (bank 2) gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P2AF0 |
|---|---|
| System | Engine and transmission |
| Group | P2Axx, Engine and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P2AF0 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 P2AF0 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
- P2AEC The intake air lambda sensor pumping current (bank 2) has a broken or
- P2AED The intake air lambda sensor pumping current (bank 2) is below normal
- P2AEE The intake air lambda sensor pumping current (bank 2) is above normal
- P2AEF The intake air lambda sensor negative current control (bank 2) has a broken or
- P2AF1 The intake air lambda sensor negative current control (bank 2) gives a higher
- P2AF2 The starter motor relay C control has a broken or disconnected wire
- P2AF3 The starter motor relay C control gives a lower signal than normal
- P2AF4 The starter motor relay C control gives a higher signal than normal
- P2A00 O2 sensor circuit range/performance (bank 1, sensor 1)
What does code P2AF0 mean?
The intake air lambda sensor negative current control (bank 2) gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
How do you clear P2AF0?
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, P2AF0 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.
