P0001 fault code: Fuel Volume Regulator Control Circuit/Open
We have no verified driving guidance for P0001. Treat as do not drive until checked. Do not open pressurised fuel pipes to 'test' the regulator.
Can I DIY?
Professional-only boundary. Do not probe or open the fuel volume regulator; this is garage electrical work.
This is the conservative boundary from the reviewed code record. This page has no frozen site-wide safety grade, so it does not publish a repair route.
What to tell the garage about P0001
Do not drive until checked. The computer has lost the electrical path that sets how much fuel the volume regulator should pass. This is an open control-circuit flag, not proof the tank is empty.
Take these reviewed, code-specific details with you. They help the garage confirm the fault without turning this page into a repair procedure.
- Fuel Volume Regulator Control Circuit/Open: Registration number
- Fuel Volume Regulator Control Circuit/Open: Exact code P0001 and any companion codes from the same scan
- Fuel Volume Regulator Control Circuit/Open: Whether the engine management light is steady or flashing
- Fuel Volume Regulator Control Circuit/Open: Any fuel smell, leak, or recent fuel-filter work
What does P0001 mean?
P0001 is a generic (SAE standard) powertrain code reported by your car’s engine control unit. It sits in the P00xx block, which covers fuel and air metering. The stored description is “Fuel Volume Regulator Control Circuit/Open”. The code itself tells you which circuit or system tripped the fault — not always the exact part that failed.
Will P0001 fail an MOT?
An illuminated engine management light is a Major defect at MOT until the fault is repaired and the lamp stays off. P0001 is a fuel-metering circuit flag, not an exhaust-catalyst result.
Before booking your test, check what usually fails on your car: see our MOT pass rates by make and model, built from 33.1 million DVSA tests.
Related guides
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P0001 — quick answers
Is it safe to drive with P0001?
Do not drive until checked. We have no verified driving guidance for P0001. Treat as do not drive until checked. Do not open pressurised fuel pipes to 'test' the regulator.
Will P0001 fail my MOT?
An illuminated engine management light is a Major defect at MOT until the fault is repaired and the lamp stays off. P0001 is a fuel-metering circuit flag, not an exhaust-catalyst result.
Fault-code identifiers are standard diagnostic facts. Their explanations and diagnostic guidance on this site are original editorial summaries, not reproduced SAE wording. MOT defect rules reflect the DVSA MOT inspection manual (2026). This page is general guidance for UK drivers, not a substitute for a professional diagnosis.