Will Replacing The Catalytic Converter Make Check Engine Light Go Off


Question: Will Replacing The Catalytic Converter Make Check Engine Light Go Off,
I have a 2005 Mazda 6 I am looking to trade in for a new car. The car works fine other than some sputtering sometimes if I pound the gas pedal early in the morning. It has 143,000 miles and is well upkept. The check engine light came on about a month ago and when I took it to the advanced auto parts store to have them read the codes; it came up as the catalytic converter ( I did not get a specific code number ). I just want the check engine light to go off so I can get the full trade in value off my car. What I’m worried about is dropping 5-700 on a catalytic converter and them telling me its something else, and something else, and 1500 dollars later my check engine light is still on. What are the chances of buying a new catalytic converter making the engine light turn off?

Best answer for Will Replacing The Catalytic Converter Make Check Engine Light Go Off

Only if the catalytic converter is the actual cause of the code and check engine light.

This code can be deceiving. It doesn’t always mean a bad catalytic converter.

There is an oxygen sensor both before and after the catalytic converters. The engine management computer compares these values against an expected range to determine how well the catalytic converters are performing.

Sometimes the check engine light and trouble code can be from a faulty oxygen sensor.

Also, sometimes when you are beating the crap out of your car this can cause the oxygen sensors to read outside the expected range. You already admitted that you like to beat the crap out of this car.

Here is what I would do. Clear the trouble codes and check engine light. Stop beating the crap out of this car. See if the code and check engine light returns. Chances are it will not. If the light comes back on for no reason, then consider the repairs.

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