P2155Fuel Injector Group D Supply Voltage Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2155 is the open or general fault of the fourth shared injector supply. On GM's 2009 Duramax V8 group 4 joins injectors 8 and 3; an open, short or missing load for 6 ms sets the code, type A. The Passat VR6 of 2014 runs four supply groups and checks group D against a high-side current window of under 2.6 A or above 14.9 A. GM petrol direct injection uses it for the high-side control line of cylinder 4. In the Saab 9-5 2.0T the supply lines are shared by cylinders 1 and 4, which is why a supply fault there stores P2146 and P2155 together (1 s, type B). The 2023–24 Corvette LT6 bulletin 24-NA-106 names P2155 among codes caused by water entering a wrong bank 2 connector. Rough running and misfire on the affected cylinders follow.
- What you may notice
- Misfire on the group D cylinders
- Rough running and reduced power
- Check engine lamp on
- Likely causes
- LikelyInjector harness damaged or wire open
- PossibleWater entering an injector harness connector
- PossibleOpen coil or piezo stack in an injector of the group
- RareFaulty power stage 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.