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P2047 — Reductant Injector Circuit Open
SeriousDEF/SCRPower derate likely — plan to stop soon
Seen on: Heavy Truck/Diesel
Reductant Injector Circuit Open. Common causes: Failed DEF doser injector.
Don't risk it — get a diesel tech on the truck.
Look up listed providers near you and give them this code when you call.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Failed DEF doser injector
- Wiring fault
- connector corrosion
First moves (roadside)
- Check doser connector
- measure coil resistance 1-3 ohms
- test supply voltage
FAQ
What does P2047 mean?
Reductant Injector Circuit Open. Common causes: Failed DEF doser injector.
How serious is P2047?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of P2047?
The most common cause is: Failed DEF doser injector. Other possibilities include Wiring fault; connector corrosion.
Can I keep driving with P2047?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.