P2295Fuel Pressure Regulator B Control 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
- P2295 stands for the control line of fuel pressure regulator B touching ground. GM's 2018 diesel ECM detects it with its low-side driver switched off: if the measured voltage corresponds to 0.5 Ω or less towards ground, the sample counts as failed, and 44 of 88 samples at 6.25 ms confirm the fault as Type B. VW's 2014 Passat quick reference describes the same fault as a ground short, with a signal voltage below 1.40 V. Chafed insulation near the rail or pump, water in the connector and a shorted valve coil are typical findings. Because a grounded low-side line can keep the valve energised regardless of command, rail pressure may drift from target and the ECM may reduce power. P2296 is the high counterpart.
- What you may notice
- Check engine light
- Rail pressure too high or unstable, reduced power
- Rough running
- Likely causes
- LikelyControl wire chafed through to ground
- PossibleWater or corrosion in the regulator connector
- PossibleShorted coil in the pressure regulator valve
- 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.