P000EFuel Volume Regulator Control Exceeded Learning Limit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- The fuel volume regulator (also called metering unit or suction control valve) is a solenoid valve on the inlet side of the high-pressure pump, used mainly on common-rail diesel engines. The engine control module pulses it to set how much fuel the pump draws in and delivers to the rail, and in this way controls rail pressure. To compensate for tolerances and wear, the control module learns a long-term correction of the regulator control. P000E is set when this correction leaves its calibrated range. The regulator is electrically fine, but the system needs an unusually large correction all the time, which points to wear or contamination of regulator or pump, a weak low-pressure supply, or a missing calibration after a pump replacement.
- What you may notice
- Check engine light on
- Often hardly noticeable at first, later loss of power
- Hard starting if rail pressure is wrong
- Additional rail pressure codes possible
- Likely causes
- LikelyFuel volume regulator worn or contaminated
- PossibleHigh-pressure pump worn, delivering less
- PossibleLow-pressure side: clogged filter, weak lift pump or air in the fuel
- PossibleNot calibrated after pump or regulator replacement
- RareRail pressure sensor drifting
- 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 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.