There are 1 owner-reported engine complaints for the 2019 Cadillac CTSin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2019 Cadillac CTS. The contact stated that while driving at 40 MPH, the check engine warning light illuminated. The vehicle was taken to an Auto Parts Store and was diagnosed with catalytic converter failure. The contact stated that upon cleaning the catalytic converter and driving for 50 miles, the warning light turned off. The vehicle was not repaired. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 74,990.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026