P2050 code meaning
Reductant Injection Valve Circuit/Open (Bank 2 Unit 1)
Powertrain system Generic code P20xx codes Check engine light
What P2050 means
P2050 reports an open circuit at the first DEF injector of Bank 2, the cylinder bank opposite cylinder 1. The code only makes sense on engines whose two exhaust banks each feed their own SCR branch with a separate valve. No manufacturer publicly documents P2050; V-engines found in bulletins, such as the Cummins 5.0 L V8 in Nissan's Titan XD, combine both banks into one SCR line and report their only valve as Bank 1, unit 1. Detection would mirror P2047: GM's 2018 diesel logic reads the driver status every 100 ms with more than 11 V and needs 30 bad samples out of 60. CARB requires such actuators to be checked as comprehensive components. Suspects are plug and harness on the second exhaust branch and the coil itself; without dosing that branch emits more NOx.
P2050 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 P2050
- MIL on
- Higher NOx from the Bank 2 branch
- DEF warning, later inducement possible
Common causes of P2050
- Most likelyUnplugged or corroded connector at the Bank 2 injector
- PossibleBroken wire in the harness of the second exhaust branch
- PossibleOpen coil in the Bank 2 DEF injector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Reductant injection valve
What each part of P2050 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. |
| 50 | The exact fault in that area. |
What to do next
- Note P2050 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 P2050
What does P2050 mean?
P2050 means "Reductant Injection Valve Circuit/Open (Bank 2 Unit 1)". P2050 reports an open circuit at the first DEF injector of Bank 2, the cylinder bank opposite cylinder 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2050?
Drive gently and only to a workshop. With P2050 the car can go into limp mode (reduced power) to protect itself.
Will P2050 fail an emissions test?
Yes, it can. P2050 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 P2050 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2050 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.