P2294Fuel Pressure Regulator B Control 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
- P2294 is the open-circuit check of the drive line to fuel pressure regulator B. GM's 2018 diesel ECM tests the low-side driver of the rail pressure regulator valve while the output is switched off: a voltage indicating more than 200 kΩ between signal and ground counts as open, and 44 failures in 88 samples at 6.25 ms set the code as Type B. VW's 2014 Passat quick reference uses a signal voltage between 1.40 and 3.20 V or an implausible signal pattern. Broken wires, a pushed-back connector pin or an interrupted valve coil are the usual findings. Without control of the valve the ECM cannot release rail pressure as intended and may limit power. P2295 and P2296 split shorts to ground and to supply.
- What you may notice
- Check engine light
- Reduced power or emergency mode
- Unstable idle or hard starting
- Likely causes
- LikelyBroken wire in the regulator harness
- PossibleLoose, corroded or pushed-back connector pin
- PossibleOpen coil in the pressure regulator valve
- RareFaulty output 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
- Medium · Often possible to do yourself.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.