P0091 — Fuel Pressure Regulator A Control Circuit Low

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

2025

1

2019

1

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?

You can usually drive short distances, but fuel economy will suffer and emissions will be higher. Get it diagnosed within a week.

Will this code cause my car to fail emissions?

Yes — any active check engine light will cause an automatic emissions test failure in most states.

How much does it typically cost to fix?

Depends on the root cause. Simple fixes like a gas cap ($5-15) to sensor replacement ($150-300) to more complex repairs ($500+).

Reported Repair Costs for P0091

Based on 3 owner-reported repair costs from NHTSA complaints.

Low End

$600

Typical

$800

High End

$800

⚠️ 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)

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P0091: Fuel Pressure Regulator A Control Circuit Low