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OBD-II · Engine and powertrain (P)

P2047

AdBlue dosing injector circuit/open bank 1 unit 1

What it means

The engine computer sees an open circuit in the AdBlue dosing injector (the valve in the exhaust that sprays AdBlue). On vehicles with SCR, a confirmed unresolved fault may trigger reduced performance or a no-restart countdown; follow the displayed warning and the vehicle handbook.

Symptoms

  • AdBlue/emissions warning, possibly with a no-start countdown
  • engine warning light

Likely causes, most likely first

Likely causes, most likely first
No.Cause
01failed dosing injector coil (heat damage)
02melted or corroded connector near the exhaust
03broken wiring
04engine computer or SCR control unit driver fault (rare)

What to check, step by step

  1. 01Inspect the injector connector and wiring near the exhaust for heat damage.
  2. 02Measure the injector coil resistance and compare with specification.
  3. 03Check wiring continuity back to the control unit.
  4. 04Replace the dosing injector if open; use a new gasket and check for crystals in the mounting.