P20AE: The AdBlue metering unit temperature sensor gives a lower signal than normal
The AdBlue metering unit temperature sensor gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
| Code | P20AE |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
How to read and clear P20AE 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 P20AE 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
- P20AA The AdBlue injection air pressure control valve has got stuck
- P20AB The AdBlue injection air pressure control valve has got stuck
- P20AC The AdBlue metering unit temperature sensor has an electrical fault
- P20AD The AdBlue metering unit temperature sensor gives readings outside the normal
- P20AF The AdBlue metering unit temperature sensor gives a higher signal than normal
- P20B0 The AdBlue metering unit temperature sensor fails now and then
- P20B1 The AdBlue heater coolant control valve has a broken or disconnected wire
- P20B2 The AdBlue heater coolant control valve 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 P20AE mean?
The AdBlue metering unit temperature sensor gives a lower signal than normal. It is usually the sensor itself, its wiring or a real fault in what it measures.
How do you clear P20AE?
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, P20AE 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.
