P0001moderate severityPowertrain
Fuel Volume Regulator Control Circuit/Open
on 2026 Volkswagen Golf 2.0L I4 TSI GTI 245 · FWD
What this code means
The PCM detected an open circuit in the fuel volume regulator control circuit. This regulator controls fuel pressure in the high-pressure fuel system.
Symptoms
- Check Engine Light
- Hard starting
- Reduced power
- Poor fuel economy
Common causes
- Faulty fuel volume regulator
- Damaged wiring or connectors
- PCM failure
- Corroded terminals
Diagnostic steps
- Read freeze frame data
- Inspect wiring to fuel volume regulator
- Test regulator resistance
- Check fuel pressure
- Test PCM output
Repair notes
Replace faulty fuel volume regulator or repair wiring.
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