Fuel Volume Regulator Control Circuit A Low
The fuel volume regulator control circuit is experiencing a low voltage issue.
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 sensor that controls how much fuel goes to the engine isn’t getting enough power, so the engine might not get the fuel it needs to run properly.
What the computer is actually seeing
The Engine Control Module (ECM) sees a voltage reading in the fuel volume regulator circuit below 0.5 volts when it should be between 4.5 to 5 volts during normal operation.
What a healthy reading looks like
Normal voltage should be between 4.5 to 5 volts. If below 0.5 volts is detected, the fault code triggers.
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. Decide: Is the wiring intact and connectors secure? If No, repair or replace as needed.
- 22. Measure the voltage at the fuel volume regulator connector with the ignition on (engine off). Expect to see 4.5 to 5 volts. Decide: Is the voltage within range? If No, follow the wiring towards the ECM for faults.
- 33. Check the resistance of the fuel volume regulator itself according to manufacturer specifications. Decide: Is the resistance within spec? If No, replace the fuel volume regulator.
- 44. If all previous tests pass, check for an ECM update or replacement. Decide: Is the ECM functioning correctly? If No, consider replacing the ECM.
Common causes
- Damaged wiring in the fuel volume regulator circuit
- Faulty fuel volume regulator
- Connector corrosion or poor connection
- ECM malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means drivability may be impacted; fix soon but it's not an immediate safety risk.
Will this code come back after repairs?
If repairs are done correctly and wiring is intact, the code should not return.
Why does this code come with others like P0001?
These codes often indicate related issues with the fuel system; they might point to the same underlying problem.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →