P2274: The signal from heated lambda sensor 3 on bank 1 stays at lean mixture
The signal from heated lambda sensor 3 on bank 1 stays at lean mixture. Check the sensor, its connector and wiring.
| Code | P2274 |
|---|---|
| System | Engine and transmission |
| Group | P22xx, NOx sensors, oxygen sensors and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P2274 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 P2274 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
- P2270 Oxygen sensor signal biased or stuck lean (bank 1, sensor 2)
- P2271 Oxygen sensor signal biased or stuck rich (bank 1, sensor 2)
- P2272 Oxygen sensor signal biased or stuck lean (bank 2, sensor 2)
- P2273 Oxygen sensor signal biased or stuck rich (bank 2, sensor 2)
- P2275 The signal from heated lambda sensor 3 on bank 1 stays at rich mixture
- P2276 The signal from heated lambda sensor 3 on bank 2 stays at lean mixture
- P2277 The signal from heated lambda sensor 3 on bank 2 stays at rich mixture
- P2278 The signals from heated lambda sensors 3 on banks 1 and 2 are swapped
- P2200 NOx sensor circuit fault (bank 1)
- P2201 NOx sensor circuit range or performance problem (bank 1)
- P2227 Barometric pressure sensor A range or performance problem
- P2228 Barometric pressure sensor A circuit low
What does code P2274 mean?
The signal from heated lambda sensor 3 on bank 1 stays at lean mixture. Check the sensor, its connector and wiring.
How do you clear P2274?
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, P2274 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.
