P2423: The hydrocarbon catalytic converter on bank 1 is below its minimum efficiency
The hydrocarbon catalytic converter on bank 1 is below its minimum efficiency. Its cleaning performance has fallen below the expected limit.
| Code | P2423 |
|---|---|
| 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 P2423 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 P2423 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
- P241E The AdBlue heater coolant control valve has got stuck
- P2420 The evaporative emission system switching valve control gives a higher signal
- P2421 The evaporative emission system vent valve has got stuck
- P2422 The evaporative emission system vent valve has got stuck
- P2424 The hydrocarbon catalytic converter on bank 2 is below its minimum efficiency
- P2425 EGR cooler valve control circuit open or faulty
- P2426 The exhaust gas recirculation cooling valve control gives a lower signal than
- P2427 The exhaust gas recirculation cooling valve control gives a higher signal than
- 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)
- P242F Diesel particulate filter restriction: ash accumulation
What does code P2423 mean?
The hydrocarbon catalytic converter on bank 1 is below its minimum efficiency. Its cleaning performance has fallen below the expected limit.
How do you clear P2423?
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, P2423 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.
