P2098 2006 Ford Fusion Code - Post Catalyst Fuel Trim System Too Lean Bank 2

The P2098 code indicates that the post-catalyst fuel trim system on Bank 2 is too lean, meaning the air-fuel mixture is too lean (not enough fuel) after the catalytic converter.

Symptoms may include poor fuel efficiency, rough idling, reduced engine performance, the Check Engine Light turning on, and sometimes hesitation during acceleration.

Common causes include a faulty oxygen sensor (downstream), exhaust leaks, vacuum leaks, fuel delivery issues, or a malfunctioning catalytic converter.

Yes, a faulty downstream oxygen sensor on Bank 2 is one of the most common causes of the P2098 code.

Diagnosis involves checking for exhaust or vacuum leaks, inspecting the downstream oxygen sensor, testing the fuel system for proper pressure, and verifying the catalytic converter's performance.

While the car may still be drivable, prolonged driving with this code can lead to reduced performance, increased emissions, and potential damage to the catalytic converter.

Repairs may include replacing the downstream oxygen sensor, fixing exhaust or vacuum leaks, cleaning or replacing the catalytic converter, or addressing any fuel system issues.

A dirty air filter typically won’t cause P2098 directly, but it can contribute to fuel mixture imbalances, which might exacerbate the issue.

Repair costs vary depending on the cause but may range from $100-$300 for an oxygen sensor replacement to over $1,000 for catalytic converter replacement.

Clearing the code without addressing the root issue may temporarily turn off the Check Engine Light, but the code will likely return if the underlying problem isn’t fixed.