P2047: AdBlue injector circuit open or faulty (bank 1, unit 1)
The ECU detects an electrical fault in the injector that sprays AdBlue into the exhaust. The connector, a damaged wire or the injector itself is typical.
| Code | P2047 |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
| Can you keep driving? | With care |
What P2047 means
Many modern diesels inject AdBlue (a urea solution) into the exhaust to cut nitrogen oxides in the SCR catalyst. The injector opens on an electrical command from the control unit; here that circuit is open or not responding as it should, so the system stops dosing.
Most common causes
- AdBlue injector connector loose, dirty or corroded
- Injector wire broken or damaged by exhaust heat
- Crystallised AdBlue deposits affecting the connector
- Failed AdBlue injector
- Fault in the control unit that manages AdBlue (uncommon)
Symptoms
- Engine warning light or AdBlue system message on
- On many cars, a countdown of miles or kilometres before the engine will not restart
- Possible loss of power
Can you drive with P2047?
With care You can drive, but the car emits more than allowed and on many models a countdown starts that prevents restarting once it reaches zero. Get it to a garage as soon as possible.
Open the bonnetthe in-depth explanation
How to check it
Check the dashboard for a distance countdown and note it for the garage. The injector is bolted into the exhaust pipe: make sure its connector is seated and free of white AdBlue deposits.
How to read and clear P2047 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 P2047 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
- P2043 The AdBlue temperature sensor gives readings outside the normal range
- P2044 The AdBlue temperature sensor gives a lower signal than normal
- P2045 The AdBlue temperature sensor gives a higher signal than normal
- P2046 The AdBlue temperature sensor fails now and then
- P2048 The circuit signal of AdBlue injector 1 on bank 1 is low
- P2049 The circuit signal of AdBlue injector 1 on bank 1 is high
- P204A The AdBlue pressure sensor has an electrical fault
- P204B The AdBlue pressure sensor 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)
To understand it properly
We explain how that system works, with drawings and no waffle, in our mechanics guide: AdBlue.
What does code P2047 mean?
Many modern diesels inject AdBlue (a urea solution) into the exhaust to cut nitrogen oxides in the SCR catalyst. The injector opens on an electrical command from the control unit; here that circuit is open or not responding as it should, so the system stops dosing.
Can you drive with P2047?
You can drive, but the car emits more than allowed and on many models a countdown starts that prevents restarting once it reaches zero. Get it to a garage as soon as possible.
How do you clear P2047?
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, P2047 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.
