P2050Reductant Injection Valve Circuit/Open (Bank 2 Unit 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- MIL on
- Higher NOx from the Bank 2 branch
- DEF warning, later inducement possible
- Likely causes
- 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
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.