Updated: March 28, 2014 at 1:50 PM

Catalytic Converter - common cause for emissions testing failure

Category: How To Auto Repair

One of the most common reasons to fail an emission testing is the Catalytic Converter. A catalytic converter is a vehicle emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction (oxidation or reduction). 

A Catalytic Converter last for about the first 160 000 km. A brand new catalytic converter can cost up to $1000. A mechanic may charge $200 to replace a catalytic converter.

An after market, without oxygen sensors may cost $200. A mechanic could charge $400 to replace the bare bones, after market catalytic converter.

The oxygen sensors also needs to be replaced every 160 000 km- 350 000 km. 

Replacing the catalytic converter does nothing else for your car other than helps you pass the emissions test. 

As the car gets older and has more mileage, the engine will start to leak oil. This oil will cause the catalytic converter to work harder, reducing it's lifespan.


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