P20A3: The AdBlue purge control valve gives a higher signal than normal
The AdBlue purge control valve gives a higher signal than normal. It is usually the part, its wiring or a connector with poor contact.
| Code | P20A3 |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
How to read and clear P20A3 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 P20A3 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
- P209F The AdBlue tank heater control gives readings outside the normal range
- P20A0 The AdBlue purge valve has an open circuit
- P20A1 The AdBlue purge control valve gives readings outside the normal range
- P20A2 The AdBlue purge control valve gives a lower signal than normal
- P20A4 The AdBlue purge control valve has got stuck
- P20A5 The AdBlue purge control valve has got stuck
- P20A6 The AdBlue injection air pressure control valve has a broken or disconnected
- P20A7 The AdBlue injection air pressure control valve gives readings outside the
- 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 P20A3 mean?
The AdBlue purge control valve gives a higher signal than normal. It is usually the part, its wiring or a connector with poor contact.
How do you clear P20A3?
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, P20A3 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.
