May 052015

For the pass 6ys my engine has came the dealer told me I need Cataylis converter, I have replaced it twice and the oxygen sensor front and back what can it be.

  One Response to “2003 toyota matrix”

  1. The good news is the engine does not need a catalytic converter to run and it will not change your fuel mileage or the drivability of the vehicle what so ever. Generally a code comes up P0420 that indicates the converter is no longer doing a sufficient job. It uses the rear o2 sensor to evaluate the function. So if it truly is reading the function is poor it will send a signal to the computer and suggest you replace it. There should be a 3-year warranty on the converter. Ask them about the warranty and you may be able to get it replaced at no cost.

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