Fuel Volume Regulator Control Range/Performance Problem (A)
There's an issue with the fuel volume regulator's control system.
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 fuel system is trying to deliver a certain amount of fuel, but it's either too much or too little, affecting engine performance.
What the computer is actually seeing
The PCM monitors the fuel volume regulator's position through a sensor and expects it to adjust fuel flow. If the regulation doesn't meet its target range, it sets this code.
What a healthy reading looks like
The fuel volume regulator should modulate to direct the required fuel pressure, typically between 5-10 volts signal to the PCM.
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.
- 1Check for loose, damaged, or corroded connectors and wiring on the fuel volume regulator. Fix as needed.
- 2Measure the fuel pressure at the rail. It should be within the manufacturer's specifications, typically between 40-60 psi. If it's low/high, investigate further.
- 3Inspect the fuel volume regulator for physical damage or blockage. Replace if necessary.
- 4Test the electrical signal to the fuel volume regulator. It should vary according to PCM requests, typically between 0-5V. If it's fixed or missing, address the PCM or wiring.
Common causes
- Faulty fuel volume regulator
- Damaged wiring or connectors leading to the regulator
- Fuel pump issues causing improper fuel pressure
- Contaminated fuel affecting regulator performance
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally drivable but may cause poor performance or fuel economy. Monitor closely.
Will the problem come back after clearing the code?
If the underlying issue isn't resolved, the code will likely return.
Why is it paired with other codes?
Multiple codes often indicate a broader fuel system issue; addressing the main problem will likely clear related codes.
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