P043A: The catalytic converter temperature sensor (bank 2
The catalytic converter temperature sensor (bank 2, sensor 2) has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P043A |
|---|---|
| System | Engine and transmission |
| Group | P04xx, Emissions control |
| Type | Generic: it means the same on every make |
How to read and clear P043A 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 P043A 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
- P0436 The catalytic converter temperature sensor (bank 2
- P0437 The catalytic converter temperature sensor (bank 2
- P0438 The catalytic converter temperature sensor (bank 2
- P0439 The catalytic converter heater control (bank 2) has an electrical fault
- P043B The catalytic converter temperature sensor (bank 2
- P043C The catalytic converter temperature sensor (bank 2
- P043D The catalytic converter temperature sensor (bank 2
- P043E The reference opening for detecting fuel vapour leaks has low flow
- P0400 Exhaust gas recirculation (EGR) flow malfunction
- P0401 Exhaust gas recirculation (EGR) flow insufficient
- P0402 Exhaust gas recirculation (EGR) flow excessive
- P0403 EGR control circuit malfunction
What does code P043A mean?
The catalytic converter temperature sensor (bank 2, sensor 2) has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P043A?
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, P043A 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.
