What does P2047 mean?
There is an electrical fault in the DEF injector (doser) circuit.
The computer tried to control the part and saw an electrical fault, usually an open circuit.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- DEF warning
- Possible speed limit countdown
Common causes
- Failed DEF injector
- Damaged wiring near the exhaust
- Corroded connector
How to diagnose P2047
- Check injector resistance against spec.
- Check wiring between the injector and the module.
How to fix it
- Repair wiring
- Replace the DEF injector
Estimated repair cost
Likely repairs for P2047 run from about $100 to $1,200, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Wiring/connector repair | $100 - $400 |
| DEF injector (doser) | $400 - $1,200 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P2047?
High severity
Fix before the derate takes effect.
P2047 FAQ
What does P2047 mean?
P2047 stands for "Reductant Injector Circuit/Open (Bank 1 Unit 1)". There is an electrical fault in the DEF injector (doser) circuit.
Can I drive with a P2047 code?
Fix before the derate takes effect.
How much does it cost to fix P2047?
It depends on the cause. The likely repairs for P2047 range from about $100 to $1,200 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P2047?
The most common causes are: failed DEF injector; damaged wiring near the exhaust; corroded connector.