P0091: Fuel Pressure Regulator A Control Circuit Low
Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What Does P0091 Mean?
P0091 is a diagnostic trouble code indicating: Fuel Pressure Regulator A Control Circuit Low. This code relates to the fuel and air metering system. It has been reported in NHTSA complaints across 2 different vehicle models.
Symptoms of P0091
- ⚠️ Check engine light illuminated
Common Causes
- 🔍 Weak or failing fuel pump
P0091 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The contact owns a 2020 Chevrolet Traverse. The contact stated that while driving at an undisclosed speed, the vehicle failed to accelerate while depressing the accelerator pedal. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who retrieved diagnost"
— Chevrolet Traverse owner, 07/04/2025
"CHECK ENGINE LIGHT CAME ON, TOOK CAR TO LOCAL O'REILLY AUTO PARTS FOR THEM TO SEE WHAT THE PROBLEM WAS. GAVE CODE P0091 WHICH YEILDED PART PR536 - FUEL PRESSURE REGULATOR. CALLED RICK CASE KIA, DULUTH, GA (ABSOLUTE TERRIBLE SERVICE/CUSTOMER SERVICE, NUMEROUS TIMES)...CAR ISN'T UNDER WARRANTY, WILL N"
— Kia Optima owner, 12/01/2019
Source: NHTSA Complaints Database
Most Reported Vehicles for P0091
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHEVROLET TRAVERSE | |
| 2 | KIA OPTIMA |
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?
Reported Repair Costs for P0091
Based on 3 owner-reported repair costs from NHTSA complaints.
⚠️ These are owner-reported costs, not estimates. Actual costs vary by location, labor rates, and root cause. Source: NHTSA complaints database.
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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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
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.