P0142: The lambda sensor (bank 1, sensor 3) has an electrical fault
The lambda sensor (bank 1, sensor 3) has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P0142 |
|---|---|
| System | Engine and transmission |
| Group | P01xx, Air and fuel metering |
| Type | Generic: it means the same on every make |
How to read and clear P0142 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 P0142 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
- P013E Heated lambda sensor 2 on bank 1 responds slowly when the mixture changes from
- P013F Heated lambda sensor 2 on bank 1 is late switching from lean to rich
- P0140 Oxygen sensor (bank 1, sensor 2): no activity
- P0141 Oxygen sensor heater (bank 1, sensor 2): circuit fault
- P0143 The lambda sensor (bank 1, sensor 3) gives a lower signal than normal
- P0144 The lambda sensor (bank 1, sensor 3) gives a higher signal than normal
- P0145 The lambda sensor circuit (bank 1, sensor 3) responds slowly
- P0146 Heated lambda sensor 3 on bank 1 shows no activity
- P0100 Mass or volume air flow sensor circuit fault
- P0101 Air flow sensor range or performance problem
- P0102 Air flow sensor circuit low input
- P0103 Air flow sensor circuit high input
What does code P0142 mean?
The lambda sensor (bank 1, sensor 3) has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P0142?
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, P0142 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.
