P2047: AdBlue injector circuit open or faulty (bank 1, unit 1)

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.

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 this same explanation and whether it’s confirmed, pending or permanent.

With Free you read this code with its short description for nothing, and clear it if the engine stores it over standard OBD. With Pro you get the full explanation, how the car was running when it was logged (revs, temperature, load) and clearing in every control unit.

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 the ITV. It’s all in how to read and clear fault codes and in the ITV and OBD.

Similar codes

• P2017 Intake manifold runner position sensor circuit high (bank 1)
• P2031 Exhaust gas temperature sensor circuit fault (bank 1, sensor 2)
• P2032 Exhaust gas temperature sensor circuit low (bank 1, sensor 2)
• P2033 Exhaust gas temperature sensor circuit high (bank 1, sensor 2)
• P204F Reductant (AdBlue) system performance (bank 1)
• P207F Reductant (AdBlue) quality performance
• P2080 Exhaust gas temperature sensor reading out of range (bank 1, sensor 1)
• P2081 Exhaust gas temperature sensor circuit intermittent (bank 1, sensor 1)
• 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)

P2047 is a generic code, so it means the same on any make, for example on BMW, Ford, Mazda, Mercedes-Benz, Peugeot, Volkswagen. See what Final OBD does on your car in makes and models.