Fuel Volume Regulator Control Circuit Low
The fuel volume regulator control circuit is detecting a low voltage or malfunction.
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What it means (plain English)
The fuel system has a regulator controlling how much fuel goes to the engine, and it's not getting enough voltage to operate properly—usually less than 0.5 volts when it should be higher.
What the computer is actually seeing
The engine control module (ECM) expects a variable voltage from the fuel volume regulator between 0.5V (minimum) and around 4.5V (maximum). If it sees below the normal range, it triggers this code.
What a healthy reading looks like
Voltage should be between 0.5V to 4.5V; resistance in the wiring should be less than 5 ohms.
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 wiring and connectors for damage or corrosion around the fuel volume regulator; repair as needed. Decision: Repair good? Go to Step 2. If no, fix the wiring and retest.
- 22. Use a multimeter to measure the voltage at the fuel volume regulator connector while the engine is running. Expected: Voltage should be between 0.5V and 4.5V. Decision: Is voltage within range? Yes: Go to Step 3; No: Check power supply and ground for the regulator.
- 33. Disconnect the fuel volume regulator and test its resistance with a multimeter. Expected: Resistance should be less than 5 ohms. Decision: Is resistance okay? Yes: Replace the fuel volume regulator; No: Replace wiring as needed and retest.
Common causes
- Damaged wiring or connectors in the fuel volume regulator circuit
- Faulty fuel volume regulator
- ECM software issues or internal failure
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
You can drive, but performance may be affected. Fix soon to avoid potential engine issues.
Will this code come back after I clear it?
It may come back if the underlying issue is not resolved.
Why does this code sometimes appear with others?
If there are multiple codes, it usually indicates a larger fuel system issue or electrical fault.
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