P0004: Fuel Volume Regulator A Control Circuit High
What Does P0004 Mean?
P0004 is a diagnostic trouble code indicating: Fuel Volume Regulator A Control Circuit High. This code relates to the fuel and air metering system. It has been reported in NHTSA complaints across 1 different vehicle models.
Symptoms of P0004
- ⚠️ Oil leak or excessive consumption
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The contact owns a 2021 Kia Soul. The vehicle was serviced under NHTSA Campaign Number: 21V259000 (ENGINE), but the failure occurred. The contact stated that DTC: P0004 was displayed. The vehicle was taken to the dealer, where an oil consumption test was scheduled to be performed. The contact was a"
— Kia Soul owner, 09/11/2025
Source: NHTSA Complaints Database
Most Reported Vehicles for P0004
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | KIA SOUL |
Frequently Asked Questions
Can I drive with this code?
Will this code cause my car to fail emissions?
How much does it typically cost to fix?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Clean or replace the mass air flow (MAF) sensor; check for vacuum leaks
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.