P2BAB: NOx emissions have exceeded the limit because the EGR flow is incorrect
NOx emissions have exceeded the limit because the EGR flow is incorrect.
| Code | P2BAB |
|---|---|
| System | Engine and transmission |
| Group | P2Bxx, Engine and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P2BAB 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 P2BAB 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
- P2BA7 NOx emissions have exceeded the limit, and the reductant fluid tank is empty
- P2BA8 NOx emissions have exceeded the limit because reductant fluid dosing has stopped
- P2BA9 NOx emissions have exceeded the limit because the reductant fluid quality is
- P2BAA NOx emissions have exceeded the limit
- P2BAC NOx exceedance: EGR deactivated
- P2BAD NOx emissions have exceeded the limit, and the cause is unknown
- P2BAE The NOx control monitor has detected that the emissions limit was exceeded
- P2BB0 The alternative fuel consumption gives a lower signal than normal
What does code P2BAB mean?
NOx emissions have exceeded the limit because the EGR flow is incorrect.
How do you clear P2BAB?
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, P2BAB 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.
