P20FB: The AdBlue pump B control has got stuck
The AdBlue pump B control has got stuck. It is usually dirt, wear or the motor that moves it.
| Code | P20FB |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
How to read and clear P20FB 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 P20FB 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
- P20F7 The AdBlue injector valve for unit 1 on bank 2 is stuck open
- P20F8 The intake manifold air control actuator circuit on bank 1 is performing poorly
- P20F9 The intake manifold air control actuator circuit on bank 2 is performing poorly
- P20FA The AdBlue pump B control has a broken or disconnected wire
- P20FC The AdBlue pump B control gives a lower signal than normal
- P20FD The AdBlue pump B control gives a higher signal than normal
- P20FE The AdBlue metering unit gives readings outside the normal range
- P20FF The AdBlue control unit gives readings outside the normal range
- P2002 Diesel particulate filter efficiency below threshold (bank 1)
- P2003 Diesel particulate filter efficiency below threshold (bank 2)
- P2004 Intake manifold runner control stuck open (bank 1)
- P2005 Intake manifold runner control stuck open (bank 2)
What does code P20FB mean?
The AdBlue pump B control has got stuck. It is usually dirt, wear or the motor that moves it.
How do you clear P20FB?
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, P20FB 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.
