Powertrain, generic · Fuel and air metering, auxiliary emission controls

P000E Fuel Volume Regulator Control Exceeded Learning Limit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Fuel volume regulator worn or contaminated
High-pressure pump worn, delivering less
Low-pressure side: clogged filter, weak lift pump or air in the fuel
Not calibrated after pump or regulator replacement
Rail pressure sensor drifting

Symptoms

  • 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

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–3,000
Time1–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel volume regulatorhigh pressure fuel pumpfuel filterrail pressure sensor

Related codes

P0002P0001P0087P0088P0191

References: law.cornell.edu, bosch-mobility.com, denso-am.eu.