P2197: O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to generic code level because this page is not scoped to one make or model.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P2197.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
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 P2197 Mean?
P2197 code: O2 Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1. Symptoms, likely causes, diagnostic path, severity, and repair cost context.
Symptoms of P2197
- ⚠️ Warning light or diagnostic trouble code is stored
- ⚠️ Reduced power, unstable throttle response, high idle, or limp mode may occur
- ⚠️ Traction/stability messages may appear when throttle data is implausible
- ⚠️ Vehicle may fail an emissions or safety inspection until the code is resolved and monitors reset
Common Causes
- 🔍 Sensor reading, wiring, connector, actuator, emissions, or module condition detected by the control module
- 🔍 Low battery voltage, poor ground, software, or network issue affecting the related circuit
- 🔍 Mechanical condition that should be confirmed with live data before replacing parts
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"This is in reference to Field Service Action 13N02 with codes P2195 and P2197. There was an extended warranty, but I never knew that as I bought the vehicle pre-owned. I am a college student and the vehicle poses a danger as I am not able to stop every time. I called the local Ford dealership, and w"
— Ford Edge owner, 2025-07-25
"I purchased this vehicle used in August 2025 from the estate of a friend's relative. The records show it was meticulously maintained and no recall notices have been unaddressed. The prior owner used it infrequently and it still has just under 90k miles. There were no major engine issues when my loca"
— Ford Edge owner, 2025-12-04
Source: NHTSA Complaints Database
Most Reported Vehicles for P2197
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | FORD EDGE |
P2197 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Is P2197 enough to replace a part?
Can I drive with P2197?
What To Do Next
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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.