P2047 code meaning
Reductant Injection Valve Circuit/Open (Bank 1 Unit 1)
Powertrain system Generic code P20xx codes Check engine light
What P2047 means
P2047 covers the electrical path of the first DEF dosing valve on Bank 1, which in nearly every SCR layout is the only one. The controller watches the valve's low-side driver and flags an open load: a broken wire, an unplugged connector or a burnt-out coil. GM's 6.6 L LML table expects roughly 200 kOhm between pin and load for 3 s (Type A); GM's 2018 diesel table counts 30 faulty samples out of 60. Ford's 2023 diesel summary reads 2.6 to 3.4 V on the idle output within 2 s. Ram found loose terminals at the injector plug, Volvo VNR trucks a harness chafed by a loose heat shield. On the LGH/LML GM ranks P2047 as a tamper-type fault, so the warning sequence toward a speed limit starts early; with no DEF sprayed, NOx rises.
P2047 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2047
- MIL on, often together with a DEF system warning
- Speed limitation countdown after continued driving
- Increased NOx, failed emissions inspection
Common causes of P2047
- Most likelyLoose, corroded or pushed-out terminals at the DEF injector plug
- PossibleHarness wire broken or chafed through near the exhaust
- PossibleOpen coil inside the DEF injector
- Less likelyFaulty output stage or software in the engine/dosing control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Reductant injection valveReductant injection harness
What each part of P2047 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 47 | The exact fault in that area. |
What to do next
- Note P2047 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2047
What does P2047 mean?
P2047 means "Reductant Injection Valve Circuit/Open (Bank 1 Unit 1)". P2047 covers the electrical path of the first DEF dosing valve on Bank 1, which in nearly every SCR layout is the only one. It is a generic code, so it means the same on every make.
Is it safe to drive with P2047?
Drive gently and only to a workshop. With P2047 the car can go into limp mode (reduced power) to protect itself.
Will P2047 fail an emissions test?
Yes, it can. P2047 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2047 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2047 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.