P2191: System Too Lean at Higher Load Bank 1
What Does P2191 Mean?
P2191 is a diagnostic trouble code indicating: System Too Lean at Higher Load Bank 1. This code relates to the powertrain system. It has been reported in NHTSA complaints across 3 different vehicle models.
Symptoms of P2191
- ⚠️ Check engine light illuminated
- ⚠️ Engine misfires
Common Causes
- 🔍 Sensor or control module malfunction
P2191 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"Previous History: Vehicle already required an engine replacement - short block assembly. Current Details: DTC P01326 - While driving - Check Engine Light blinks & vehicle's acceleration is immediately reduced, causing dangerous disruption to the flow of traffic while merging into traffic from exit "
— Hyundai Tucson owner, 01/09/2022
"On Sunday, September 21st, 2025, my 2013 Kia Optima EX suffered sudden catastrophic engine failure while driving on the highway. The check engine light was flashing, the car misfired badly, lost complete power, and became unsafe to operate. The vehicle was then towed to Wagner Kia of Shrewsbury, MA."
— Kia Optima owner, 09/21/2025
"I HAVE BEEN HAVING REPEATED ISSUES FOLLOWING THE KIA THETA II ENGINE RECALL REPLACEMENT (SC147) SINCE JUNE 2018. MY CAR IS PRACTICALLY NEW WITH 53K +/- MILES, PURCHASED NEW, AND HAD ALL THE RECOMMENDED AND REQUIRED MAINTENANCE PERFORMED. I TOOK MY CAR TO RICK CASE KIA (DEALER CODE:GA083) TO HAVE MY"
— Kia Optima owner, 06/09/2018
Source: NHTSA Complaints Database
Most Reported Vehicles for P2191
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | KIA OPTIMA | |
| 2 | HYUNDAI TUCSON | |
| 3 | KIA FORTE |
P2191 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 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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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.