P2293Fuel Pressure Regulator B Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2293 checks whether fuel pressure regulator B really controls rail pressure. In GM's 2018 diesel table regulator B is the rail pressure regulator valve; the code sets when, with that valve in charge, rail pressure rises above a calibrated ceiling of 67 to 217 MPa in 160 of 229 samples at 6.25 ms, Type A. VW's 2014 quick reference for the Passat, which still uses the older name regulator 2, flags a gap between commanded and measured pressure beyond plus or minus 1.5 MPa. GM preliminary information PIP5988 for the 2024 3.0 L Duramax (LZ0) advises replacing the high-pressure rail that carries the valve, not the pump, when P2293 appears alone or with P0089. P2294 to P2296 cover the electrical side of the same valve.
- What you may notice
- Check engine light
- Reduced power or stalling in severe cases
- Hard starting
- Likely causes
- LikelyRail pressure regulator valve sticking or worn (often replaced with the rail)
- PossibleRail pressure sensor reading wrong
- RareContaminated fuel affecting the valve
- RareEngine control software issue
- 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: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.