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What 10 owners told NHTSA about the 2019 Cadillac CTS
These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.
1 of 10 complaints match · Engine & cooling · clear filters
Oct 27, 2025Engine & cooling
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.
NHTSA ODI 11695874
Working with the data? Download all 10 complaints as CSV · fetched from NHTSA July 21, 2026
How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your
pre-purchase inspection list. Back to the
full 2019 Cadillac CTS verdict →