Catalytic Converter Failure

2014 Buick Encore

This problem may be covered under warranty. Ask your Buick dealer.


definitely annoying
Typical Repair Cost:
Average Mileage:
52,250 miles
Total Complaints:
4 complaints

Most Common Solutions:

  1. replace catalytic converter, o2 sensor (4 reports)
2014 Buick Encore exhaust system problems

exhaust system problem

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2014 Buick Encore Owner Comments

problem #4

Oct 102023

Encore Limited 4.L

  • Automatic transmission
  • 54,000 miles


took to mechanic. Johnston Gas, 1209 Hartford Ave., Johnston, ...Rhode Island, in October 2023. My engine light was on, and he said it read that the catalytic converter had to be replaced. He replaced it and a month later the engine lite came on again,

- jopiet47jp, Johnston,RI, US

problem #3

Oct 102023

Encore Limited 4.L

  • Automatic transmission
  • 54,000 miles

In November of 2023 the catalytic converter was replaced on my car. After a month's use the engine light came on again, my mechanic (his name is Joseph) said it was the catalytic converter in the front now. He says the Buick, Encore has two catalytic converters in the car. So, he replaces the second one. About a month later the engine light comes on and I go back to him again. He says to wait a few weeks because he has a problem with his back. He says it is OK to run the car with the engine light on. I go back in a few weeks he says he has to have an operation on his back. He says it will be about eight to ten weeks and he will be back. In the meantime, he sells the station. I go back and talk to the new owner. He says he will not stand by the other mechanic's work, and he doesn't know where Joseph went. So now I do not know what to do. My inspection is due in January, 25 and I know I will not be able to get an inspection sicker with the engine light on.

- jopiet47jp, Johnston,RI, US

problem #2

May 152017


  • Automatic transmission
  • 89,000 miles

I am annoyed that the warranty for emissions only lasts til 80,000 and mine just went out right after that, even though the car is 3 years old. The dealer said it is a VERY COMMON problem on the Encores. After having an Enclave and all the problems it had, I will never have another Buick.

- Kimberly K., Houston, TX, US

problem #1

Jul 122015


  • Automatic transmission
  • 12,000 miles

Purchased the car new in September 2014. At around 12,000 miles, the catalytic converter & 02 Sensor had to be replaced.

- okkathy, Hominy, OK, United States

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