P2434: The secondary air flow or pressure sensor circuit on bank 1 works
The secondary air flow or pressure sensor circuit on bank 1 works intermittently or erratically. Check the sensor, connector and wiring.
| Code | P2434 |
|---|---|
| System | Engine and transmission |
| Group | P24xx, EGR, EVAP and particulate filter |
| Type | Generic: it means the same on every make |
How to read and clear P2434 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 P2434 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
- P2430 There is a fault in the secondary air flow or pressure sensor circuit on bank 1
- P2431 The secondary air flow or pressure sensor on bank 1 performs outside its
- P2432 The secondary air flow or pressure sensor circuit on bank 1 has a low signal
- P2433 The secondary air flow or pressure sensor circuit on bank 1 has a high signal
- P2435 There is a fault in the secondary air flow or pressure sensor circuit on bank 2
- P2436 The secondary air flow or pressure sensor on bank 2 performs outside its
- P2437 The secondary air flow or pressure sensor circuit on bank 2 has a low signal
- P2438 The secondary air flow or pressure sensor circuit on bank 2 has a high signal
- P2400 EVAP leak detection pump control circuit open or faulty
- P2413 Exhaust gas recirculation (EGR) system performance
- P2414 O2 sensor exhaust sample error (bank 1, sensor 1)
- P2425 EGR cooler valve control circuit open or faulty
What does code P2434 mean?
The secondary air flow or pressure sensor circuit on bank 1 works intermittently or erratically. Check the sensor, connector and wiring.
How do you clear P2434?
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, P2434 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.
