How does your Altima 2011 act when your catalytic converter is bad

Asked by Mary Ann Feb 18, 2020 at 04:55 PM about the 2011 Nissan Altima

Question type: Maintenance & Repair

Got the code for catalytic converter..how does your car act when it is bad?

1 Answer

140

You probably won't notice a difference in drivability unless its clogged up. In that case you'd experience low power and most likely a rough idle from all the exhaust back pressure. All the car is doing is measuring how clean the exhaust is after the cat. If it falls outside of a predetermined threshold it will tell you that you require a replacement. Unfortunately they are quite expensive as they contain precious metals. Have the O2 sensors tested before you go ahead with a new cat. It would be a shame to spend all that money to find out it was a sensor all along. Best of luck

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