P2150Fuel Injector Group B Supply Voltage Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2150 reports the common feed of injector group B shorted toward ground. In GM's 2018 Duramax tables group 2 holds injectors 2 and 3 on the 2.8 L four-cylinder but injectors 2 and 5 on the 6.6 L V8; the test is the same as for group A – 0.5 Ω or less to ground with the driver on, 5 failed samples out of 10, type A with lamp on the first trip. Ford's 2023 diesels flag a short of group B to ground or battery, detected by the driver chip in roughly 0.2 s. GM petrol direct injection, documented for the Saab 9-5 2.0T, uses P2150 for low voltage on the high-side control line of cylinder 2. Because both injectors of a diesel bank lose their feed, the engine runs on fewer cylinders. P2149 is the open circuit, P2151 the high fault of this group.
- What you may notice
- Two cylinders misfire together
- Marked power loss and vibration
- Check engine lamp on immediately
- Likely causes
- LikelyGroup B supply wire chafed and shorted to ground
- PossibleInjector of group B shorted to its body
- PossibleMoisture in the injector harness connector
- RareFaulty injector driver in the engine control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.