Engine and gearbox (P)
P000E: Fuel Volume Regulator Learning Limit Exceeded
The engine control unit (ECU) has detected that the fuel volume regulator has reached its learning limit. This suggests a persistent difference between the desired and actual fuel rail pressure.
Checked by a licensed car technician · last reviewed 29 September 2026
Symptoms
- Engine may run rough
- Reduced fuel efficiency
- Possible loss of power
- Check engine light on
Common causes
- Fuel filter clogged, restricted supply
- HP pump worn out
- Internal leak in injector or rail
How to check it yourself
- Check and replace fuel filter if needed
- Inspect fuel lines for leaks or blockages
- Test fuel pressure at the rail
- Inspect injectors for leaks
- Check high-pressure fuel pump operation
Can I keep driving?
The car can be driven, but performance may be reduced. Address the issue soon to avoid further damage.
General guidance, not a professional inspection. Confirm faults with measurements before buying parts, and use a qualified mechanic for brakes, steering, fuel leaks, airbags, and other safety-critical work. Terms and disclaimer