Complaint 2122884

Complaint Summary

ENGINE

Owner Narrative

I own a 2020 Kia Forte LXS with approximately 136,000 miles. The check engine light came on with code P0420 (“catalyst system efficiency below threshold”), and an Express Oil Change & Tire Engineers location confirmed the catalytic converter is failing. The back pressure was measured and is within spec but slightly elevated, showing the part is deteriorating. I was also told my O2 sensors are burned due to the failing catalytic converter. This failure affects drivability and safety: the vehicle sometimes struggles on acceleration and hills, and I feel vibrations through the gas pedal. Because I commute 50 miles each way to work on the interstate, sudden loss of power would put me at risk in high-speed traffic. I have learned Kia and Hyundai vehicles from other years/models (including the Forte) have had recalls and extended warranties for premature catalytic converter failure and excessive oil consumption, but Kia has not yet extended coverage to the 2020 Forte. This appears to be the same issue. The vehicle has been inspected by Express Oil Change & Tire Engineers, and the quoted cost for replacement is $3,000–$3,600. This should be investigated for potential recall or warranty extension to include the 2020 model year.

Owner-submitted narrative on file with NHTSA. Complaint narratives are self-reported and have not been verified.