P2414: O2 sensor exhaust sample error (bank 1, sensor 1)
The upstream oxygen sensor is reading outside air where it should see exhaust gas. Usually an exhaust leak or a worn sensor.
| Code | P2414 |
|---|---|
| System | Engine and transmission |
| Group | P24xx, EGR, EVAP and particulate filter |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P2414 means
The oxygen sensor measures leftover oxygen in the exhaust so the ECU can adjust the fuel mixture. This is the bank 1 sensor before the catalytic converter. The ECU has seen it report a very lean mixture when it should not, as if fresh air were getting in, so it no longer trusts the reading.
Most common causes
- Exhaust leak ahead of the sensor: manifold gasket, cracked manifold or loose clamp
- Oxygen sensor not tightened properly in its thread
- Contaminated or worn oxygen sensor
- Damaged sensor wiring or connector
- Intake air leak making the mixture lean
Symptoms
- Engine warning light on
- Puffing or ticking noise from the exhaust, especially when cold
- Higher fuel consumption
- Slightly rough idle
Can you drive with P2414?
With care You can drive, but have it checked soon: a wrong mixture raises fuel use and can eventually damage the catalytic converter.
Open the bonnetthe in-depth explanation
How to check it
With the engine cold, listen near the exhaust manifold just after starting for a rhythmic puffing or ticking, which often points to a failed gasket. On live data the sensor should switch quickly between rich and lean at warm idle.
How to read and clear P2414 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 P2414 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
- P2410 The fuel cap warning sensor or switch circuit signal is low
- P2411 The fuel cap warning sensor or switch circuit signal is high
- P2412 The fuel cap warning sensor or switch circuit signal is intermittent or erratic
- P2413 Exhaust gas recirculation (EGR) system performance
- P2415 The lambda sensor exhaust sample (bank 2, sensor 1) is not working properly
- P2416 The signals from heated lambda sensors 2 and 3 on bank 1 are swapped
- P2417 The signals from heated lambda sensors 2 and 3 on bank 2 are swapped
- P2418 The evaporative emission system switching valve control has a broken or
- P2400 EVAP leak detection pump control circuit open or faulty
- P2425 EGR cooler valve control circuit open or faulty
- P242F Diesel particulate filter restriction: ash accumulation
- P244A Diesel particulate filter differential pressure too low (bank 1)
What does code P2414 mean?
The oxygen sensor measures leftover oxygen in the exhaust so the ECU can adjust the fuel mixture. This is the bank 1 sensor before the catalytic converter. The ECU has seen it report a very lean mixture when it should not, as if fresh air were getting in, so it no longer trusts the reading.
Can you drive with P2414?
You can drive, but have it checked soon: a wrong mixture raises fuel use and can eventually damage the catalytic converter.
How do you clear P2414?
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, P2414 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.
