P249D: The closed loop AdBlue injection control in the limit flow gives a lower signal
The closed loop AdBlue injection control in the limit flow gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | P249D |
|---|---|
| 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 P249D 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 P249D 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
- P2499 The EGR cooler bypass position sensor (bank 2) gives a lower signal than normal
- P249A The EGR cooler bypass position sensor (bank 2) gives a higher signal than normal
- P249B The EGR cooler bypass position sensor (bank 2) fails now and then
- P249C AdBlue injection control takes too long to enter closed loop operation
- P249E The closed loop AdBlue injection control in the limit flow gives a higher
- P249F The particulate filter regeneration control takes too long to enter closed loop
- P24A0 The closed loop particulate filter regeneration control in the limit
- P24A1 The closed loop particulate filter regeneration control in the limit
- 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 P249D mean?
The closed loop AdBlue injection control in the limit flow gives a lower signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear P249D?
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, P249D 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.
