P20CA: There is a leak in the AdBlue injection air pressure
There is a leak in the AdBlue injection air pressure. The leak has to be found and repaired.
| Code | P20CA |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
How to read and clear P20CA 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 P20CA 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
- P20C6 The AdBlue heater D control gives readings outside the normal range
- P20C7 The AdBlue heater D control gives a lower signal than normal
- P20C8 The AdBlue heater D control gives a higher signal than normal
- P20C9 The AdBlue control unit requests the engine warning lamp to come on
- P20CB The exhaust after-treatment fuel injector A control has a broken or
- P20CC The exhaust after-treatment fuel injector A control gives readings outside the
- P20CD The exhaust after-treatment fuel injector A control gives a lower signal than
- P20CE The exhaust after-treatment fuel injector A control gives a higher signal than
- 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 P20CA mean?
There is a leak in the AdBlue injection air pressure. The leak has to be found and repaired.
How do you clear P20CA?
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, P20CA 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.
