Fuel Volume Regulator Control Circuit/Open
There's a problem with the fuel volume regulator control circuit or it's open.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The car’s computer is trying to control the flow of fuel from the tank, but it’s not seeing what it expects from the regulator which can cause poor performance or stalling.
What the computer is actually seeing
The Engine Control Module (ECM) expects to receive a signal between 0.5 to 4.5 volts from the fuel volume regulator. If the voltage is outside this range or a circuit fault occurs, it triggers the code.
What a healthy reading looks like
Look for a control voltage signal typically ranging from 0.5V (low fuel volume) to 4.5V (high fuel volume).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the fuel level - ensure there’s enough fuel in the tank. If low, fill it up and recheck for the code.
- 22. Inspect the wiring and connectors to the fuel volume regulator for visible damage or corrosion - repair or replace as needed and retest.
- 33. Using a multimeter, measure the voltage at the fuel volume regulator connector; it should be between 0.5V and 4.5V with the engine running. If not, check wiring continuity; repair if necessary.
- 44. If the voltage is in spec but the code persists, replace the fuel volume regulator and reset the codes to see if it resolves the issue.
Common causes
- Open or shorted wiring in the fuel volume regulator circuit
- Faulty fuel volume regulator
- Bad ECM
- Corroded or damaged connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; avoid heavy acceleration as it can affect performance, but it can be driven short distances.
Will this code come back after resetting?
If the problem isn't fixed, the code will likely reappear after reset.
Why does this code sometimes pair with P0002?
P0002 is related to the same system but usually indicates a circuit performance issue rather than an open circuit or connection.
Working a real vehicle right now?
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