P049B: The EGR B exhaust gas recirculation flow is insufficient
The EGR B exhaust gas recirculation flow is insufficient.
| Code | P049B |
|---|---|
| System | Engine and transmission |
| Group | P04xx, Emissions control |
| Type | Generic: it means the same on every make |
How to read and clear P049B 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 P049B 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
- P0497 EVAP system low purge flow
- P0498 The evaporative emission system vent control gives a lower signal than normal
- P0499 The evaporative emission system vent control gives a higher signal than normal
- P049A There is a fault in the exhaust gas recirculation B flow
- P049C The EGR valve actuator B allows excessive exhaust gas flow
- P049D The exhaust gas recirculation A control position needs its learning procedure
- P049E The exhaust gas recirculation B control position needs its learning procedure
- P049F The exhaust pressure control valve B is not working properly
- 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 P049B mean?
The EGR B exhaust gas recirculation flow is insufficient.
How do you clear P049B?
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, P049B 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.
