OBD-II code · Powertrain (generic)
P0001 Fuel Volume Regulator A Control Circuit/Open
The ECU detects an open circuit in the control of fuel volume regulator A (often the metering valve on the high-pressure fuel pump). The actuator does not respond, so rail pressure cannot be controlled accurately.
Is it safe to drive with P0001?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWiring break or unplugged connector
- PossibleRegulator solenoid coil open
- Less likelyECU output driver failed
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Volume Regulator, High Pressure Fuel Pump, Fvr Wiring, Fvr Connector
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.