P2231: The signal circuit of lambda sensor 1 on bank 1 is shorted to its heater circuit
The signal circuit of lambda sensor 1 on bank 1 is shorted to its heater circuit.
| Code | P2231 |
|---|---|
| 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 P2231 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 P2231 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
- P222D The barometric pressure sensor B gives a higher signal than normal
- P222E The barometric pressure sensor B fails now and then
- P222F The readings of atmospheric pressure sensors A and B do not agree
- P2230 The barometric pressure sensor A fails now and then
- P2232 The signal circuit of heated lambda sensor 2 on bank 1 is shorted to its heater
- P2233 The signal circuit of heated lambda sensor 3 on bank 1 is shorted to its heater
- P2234 The signal circuit of heated lambda sensor 1 on bank 2 is shorted to its heater
- P2235 The signal circuit of heated lambda sensor 2 on bank 2 is shorted to its heater
- 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 P2231 mean?
The signal circuit of lambda sensor 1 on bank 1 is shorted to its heater circuit.
How do you clear P2231?
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, P2231 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.
