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EmissionsSeverity Medium: diagnose soon

P2047Reductant Injector Circuit/Open (Bank 1 Unit 1)

What it means

The ECU sees an open circuit in the AdBlue injector (dosing valve) circuit.

Symptoms

  • AdBlue or emissions warning
  • Countdown to a no-restart condition on many cars
  • Usually no change in power until the countdown ends

Common causes

  • Open dosing valve winding
  • Wiring or connector fault (heat damage near the exhaust)
  • Crystallised or seized dosing valve

What to check first

  1. Measure the dosing valve resistance
  2. Inspect the connector and wiring near the exhaust
  3. Run the dosing test into a measuring cup
Can I drive with P2047? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P2047: questions and answers

What does P2047 mean?

P2047: Reductant Injector Circuit/Open (Bank 1 Unit 1). The ECU sees an open circuit in the AdBlue injector (dosing valve) circuit.

What are the symptoms of P2047?

AdBlue or emissions warning. Countdown to a no-restart condition on many cars. Usually no change in power until the countdown ends.

What causes P2047?

Open dosing valve winding. Wiring or connector fault (heat damage near the exhaust). Crystallised or seized dosing valve.

How do you diagnose P2047?

1. Measure the dosing valve resistance 2. Inspect the connector and wiring near the exhaust 3. Run the dosing test into a measuring cup

Can I drive with P2047?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.