Question about Cars & Trucks
The engine is controlled by a computer, the computer is now getting bad readings from the O2 sensor, some are located in the cat, or just before it. wich will also efect the egr valve and posably the map sencer
Posted on May 06, 2014
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Posted on Jan 02, 2017
This is an expensive repair...catalytic coverters need replacing if everything else checks out on the car. However, a loose oxygen sensor lead would make the car running rich
Posted on Mar 27, 2009
You cannot bypass the catalytic converter and expect the car to run properly and the check engine light to remain off. When you go to replace the cat, DO NOT attempt to use an aftermarket brand. Even many of the "OEM" aftermarket converters do not have sufficient back pressure and within 2 months they are ruined. I know, I have replaced mine that was purchased at Advance Auto Parts three times in the last six months! Shell out the money for an original Mazda converter. List is about $736.50, but you can find a dealer in Virginia that discounts them 20% down to $589.08. Just remember, the car's computer is programmed to read the O2 sensors' data and adjust accoringly. A new Mazda cat will allow your car to run like it did when it came off the assembly line, everything else equal.
Posted on Aug 14, 2009
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