P2098 2018 Chevrolet Silverado Code - Post Catalyst Fuel Trim System Low Limit Bank 2

P2098 indicates "Post Catalyst Fuel Trim System Low Limit Bank 2," meaning the oxygen sensor readings behind the catalytic converter on Bank 2 are showing a lean condition.

Common symptoms include reduced fuel efficiency, rough idling, possible hesitation during acceleration, and the check engine light being illuminated.

Common causes include a faulty oxygen sensor, exhaust leaks, a failing catalytic converter, vacuum leaks, or issues with the fuel system like low fuel pressure or dirty injectors.

If the oxygen sensor is faulty, you may notice inconsistent voltage readings during diagnosis. Testing with a multimeter or scan tool can confirm if the sensor is malfunctioning.

Yes, an exhaust leak near the Bank 2 post-catalyst oxygen sensor can allow extra oxygen into the exhaust stream, leading to a false lean condition.

While it may not cause immediate damage, ignoring the code can lead to poor performance, reduced fuel efficiency, and potential damage to the catalytic converter over time.

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

A severely clogged air filter could potentially contribute to a lean condition, but it is less likely to be the primary cause for P2098.

Not necessarily. The catalytic converter should only be replaced if diagnostics confirm it is failing; otherwise, focus on sensors, leaks, or fuel system issues first.

Repair costs vary depending on the cause. Oxygen sensor replacement typically costs $150–$300, while fixing exhaust leaks or replacing the catalytic converter can cost significantly more.