P2198: O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1
What Does P2198 Mean?
P2198 is a diagnostic trouble code indicating: O2 Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1. This code relates to the powertrain system. It has been reported in NHTSA complaints across 4 different vehicle models.
Symptoms of P2198
- ⚠️ Check engine light illuminated
Common Causes
- 🔍 Faulty oxygen sensor
- 🔍 Worn or fouled spark plugs
- 🔍 Loose or damaged gas cap
- 🔍 Sensor or control module malfunction
P2198 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"At 74k miles my check engine light came on randomly. Took the car to a mechanic, who turned the light off and advised me to tighten the gas cap. A few weeks later the check engine light came back on. Auto zone said a spark plug needed replacement. About a week later the check engine light, along wit"
— Honda Fit owner, 10/03/2023
"THE ENGINE LIGHT IS ON IN MY CAR. I TOOK IT TO A REPAIR SHOP AND THEY SAID IT HAD THE CODES OF P2196 AND P2198 A H02S HEATED OXYGEN SENSOR IS MALFUNTIONING. WHEN THE REP PULLED UP THE CODES HE INFORMED ME THEY HAD THOUSANDS OF MY SAME VEHICLE WITH THE SAME PROBLEM. I CONTACTED FORD WARRANTY AND THEY"
— Ford Edge owner, 01/13/2020
"AUGUST 21 ON THE WAY TO WORK (4 MILE DRIVE) THE TRUCK STARTED TO SHAKE AND LOST POWER,CHECK ENGINE LIGHT CAME ON, WE TOOK THE TRUCK TO THE DEALER,AND THEY CAN NOT FIGURE WHAT IS GOING ON,SO THEY SAID THE ENGINE NEEDS TO BE REPLACED. THE CODES ARE P0022-P0305-P0307-P1184-P2198-P2273 MY FAMILY JUST"
— Ford Expedition owner, 08/21/2008
Source: NHTSA Complaints Database
Most Reported Vehicles for P2198
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | HONDA FIT | |
| 2 | FORD EDGE | |
| 3 | FORD EXPEDITION | |
| 4 | MERCEDES-BENZ E-CLASS |
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
- 🔧 Check and tighten the gas cap — replace if cracked or damaged ($5-15)
- 🔧 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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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.