P042F: The exhaust gas recirculation A control has got stuck
The exhaust gas recirculation A control has got stuck. It is usually dirt, wear or the motor that moves it.
| Code | P042F |
|---|---|
| System | Engine and transmission |
| Group | P04xx, Emissions control |
| Type | Generic: it means the same on every make |
How to read and clear P042F 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 P042F 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
- P042B The catalytic converter temperature sensor (bank 1
- P042C The catalytic converter temperature sensor (bank 1
- P042D The catalytic converter temperature sensor (bank 1
- P042E The exhaust gas recirculation A control has got stuck
- P0430 Catalytic converter efficiency below threshold (bank 2)
- P0431 Warm up catalyst efficiency below threshold (bank 2)
- P0432 The main catalytic converter on bank 2 works below the required efficiency
- P0433 The heated catalyst on bank 2 is working below the minimum efficiency threshold
- 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 P042F mean?
The exhaust gas recirculation A control has got stuck. It is usually dirt, wear or the motor that moves it.
How do you clear P042F?
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, P042F 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.
