P045B: The exhaust gas recirculation B control gives readings outside the normal range
The exhaust gas recirculation B control gives readings outside the normal range. It is usually the part, its wiring or a connector with poor contact.
| Code | P045B |
|---|---|
| System | Engine and transmission |
| Group | P04xx, Emissions control |
| Type | Generic: it means the same on every make |
How to read and clear P045B 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 P045B 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
- P0457 EVAP system leak: fuel cap loose or missing
- P0458 EVAP purge control valve circuit low
- P0459 EVAP purge control valve circuit high
- P045A The exhaust gas recirculation B control has an electrical fault
- P045C The exhaust gas recirculation B control gives a lower signal than normal
- P045D The exhaust gas recirculation B control gives a higher signal than normal
- P045E The exhaust gas recirculation B control has got stuck
- P045F The exhaust gas recirculation B control has got stuck
- 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 P045B mean?
The exhaust gas recirculation B control gives readings outside the normal range. It is usually the part, its wiring or a connector with poor contact.
How do you clear P045B?
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, P045B 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.
