Q: Can the catalytic converter cause lose of power in my car on 2002 Chevrolet Trailblazer

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The service engine light came on had it scanned said it was the converter, now lose of power engine light comes on when i first start the car
(2) Answers
If it's clogged at all , yes. It can also cause overheating and poor fuel economy and poor running in general. IF you have the converter replaced , get the CAUSE of it's failure diagnosed and fixed , otherwise you'll be replacing it again , most likely.
my converter went took to my chev dealer and they said depending on your mileage there was a recall and they replaced it free of charge if your under 70000 miles it covered under chevy warrantee