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The Millenias and their Commonwealth cousins the "Xedos" all suffered a common defect resulting in MOST CEL issues. This engine configuration typically results in the need for replacement of 1 to 2 O2 sensors and / or the DREADED KNOCK Sensor embedded deep in the Manifold assembly. Mine ran 3 years with this CEL on due to the cost of labour one item to replace. The sensor was only 165 bucks while the labour to install was nearly 800.
I will admit once it was replaced I was not only legal again for the Emmissions test, but the thing ran smoother than it ever did ina ll seasons PLUS I got nearly 2 points to my highway Mileage.
Now the codes are confusing on this because two of the O2 sensors share the same circuit and the code wont necessarily identify WHICH o2 is actually bad, that unfortunately is hit or miss. The KNOCK sensor code is separate and distinct however but all will result in a costly set of repairs.
So to answer your question a different way, there are 4 O2 sensors all over the compartment PLUS the knock sensor in the Manifold.
Only One of the O2 sensors is even visible much less service-able by the average DIY person.
Good Luck, Been there (3 times now)Done that.
Pay somebody, you will live longer.
What else can I help you with?
Where is the module located on a Mazda millenia 2000 2.5l?
how to change speedometer sensor on mazda millenia 2000 2.3 v6
What other struts will fit 2000 Mazda millenia?
2001 Mazda millenia
Where is the fuel pump located on a 2000 Mazda millenia?
in the fuel tank. you gotta drop the tank
Where is the engine temp sensor on the 2000 mazda millenia?
On the 2000 Mazda Millenia, the engine temperature sensor is typically located near the thermostat housing. It is usually situated on the engine block or cylinder head, often connected to the cooling system. To access it, you may need to remove some components or covers, depending on the specific configuration of the engine. Always refer to a service manual for precise locations and steps specific to your vehicle.
How many miles per gallon does a 2000 Mazda millenia get?
The Mazda millenia from 2000 gets 20 mpg, 28 on the highway, and 25 on average.
Where is the o2 sensor bank 1 located on a 2000 Mazda miata?
The 2000 Mazda Miata O2 sensor bank 1 is located on the firewall in the engine compartment. The sensor can be found on the passenger side of the firewall.
Where does the map sensor go on a 2000 Mazda millenia?
On a 2000 Mazda Millenia, the manifold absolute pressure (MAP) sensor is typically located on the intake manifold, near the throttle body. It is usually mounted on the upper part of the engine, connected to the intake system to measure the air pressure. To access it, you may need to remove some engine covers or components for better visibility. Always refer to a repair manual for specific instructions and diagrams.
How do you replace a 2000 Mazda millenia alternator?
bottom
How many coils do a 2000 Mazda millenia s have?
a Mazda millenia with a miller cycl engine 2.3 engine has 6 igition coils
Does the 2000 Mazda millenia have a cabin air filter and if so where is it at?
millenia starting with my 2001 had cabin filters. 2000 my and before no hava
Where is the camshaft sensor located on a 2000 Mazda 626?
It's part of the distributor
Where is the horn located on the 2000 Mazda millenia?
The horn on the 2000 Mazda Millenia is located in the front of the vehicle, typically behind the front grille or near the radiator support. It is mounted on the driver's side and can be accessed by removing the necessary components to reach that area. If you're looking to replace or troubleshoot the horn, it's advisable to consult the vehicle's service manual for detailed instructions.
