![]() Many manufacturers give a five year, unlimited mileage warranty on these items. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it. 100mV to 600mV) then it's time to replace the catalytic converter. The voltage should be low and steady ( 200mV, depends on the vehicle). Next step is to measure the voltage at the oxygen sensor on Bank 1 (the rear sensor, or the sensor after the converter). Location : Front Emissions : Federal EPA Standard, 46-State Legal (Cannot ship to or be used in vehicles originally purchased in CA, CO, NY or ME) Restricted States : CaliforniaColoradoNew YorkMaine. ![]() Possible Solutions: The simplest thing to do is to reset the code and see if it comes back. ![]() The catalytic converter is no longer functioning properlyĪn oxygen sensor is not reading (functioning) properly 842183637 Mazda Protege 2002, Catalytic Converter and Pipe Assembly by Davico®. It’s also common that the front or rear oxygen sensor breaks or is defective by nature, thus causing. The code may be more likely to occur after the engine has had numerous cold starts in the past 1-2 days.Ĭauses A code P0421 may mean that one or more of the following has happened: One of the most common causes of the P0421 issue is a faulty or damaged catalytic converter. Symptoms:You will likely not notice any drivability problems, although there may be symptoms. It is part of the vehicle emissions system. What does that mean?Basically this means that the oxygen sensor downstream of the catalytic converter on bank 1 is detecting that the converter is not working as efficiently as it should be (according to specs). As you can imagine, this is often accompanied by a loss of power due to exhaust blockage.Technical DescriptionWarm Up Catalyst Efficiency Below Threshold (Bank 1) This can often be heard, as smaller ceramic pieces will bounce around inside the converter housing. Finally, physical damage can sometimes occur if a large rock or other object hits Mazda Protege catalytic converter, resulting in a damaged ceramic core. Problem with your Mazda Our list of 158 known complaints reported by owners can help you fix your Mazda. ![]() If you are replacing your Mazda Protege catalytic converter due to any of the above circumstances, it is a good idea to also replace your oxygen sensor, since it plays a vital role in the air/fuel mixture ratio and may have also been damaged due to the same adverse conditions. The 'Italian Tune-Up' The 'Italian Tune-Up' is a common fix for a range of automotive problems, including a clogged catalytic converter. Other common symptoms include: a lack of power, rough engine idle, or stalling. Another common sign of catalytic converter failure is the infamous "rotten egg" smell. It is common to see your Mazda Protege catalytic converter glowing orange/red when this condition is present. So how do you know if your Mazda Protege catalytic converter is on its way out? If your Mazda Protege engine seems to be losing power or your temperature gauge reads a little high, one possible culprit could be that a rich condition is feeding excessive unburned fuel into the catalytic converter, which can overheat it as well as damage it. Aftermarket high-flow Mazda Protege catalytic converters are therefore a much better (and more responsible) choice for those seeking to upgrade their exhaust systems or replace a faulty converter. IF AN ENGINE PERFORMANCE ISSUES EXIST, AND IT HAS NOT BEEN. Modern catalytic converters are much less restrictive than in days past, so much so that the antiquated (and illegal) method of "gutting" the converters of their internal structures has been deemed almost pointless on newer cars, as the performance gains are minimal, if any. Buy Royal Exhaust Catalytic Converter Compatible with 2001, 2002, 2003 Mazda Protege Protege5.
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