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.
Good Luck
Fix the problem it is telling you about - It will jsut come back on if you dont M
how to change speedometer sensor on mazda millenia 2000 2.3 v6
The millenia P - has 2.5 liter engine, The Millenia S has a 2.3 liter engine
a Mazda millenia with a miller cycl engine 2.3 engine has 6 igition coils
The 626 and the Millenia share the same 2.5 liter engine,the only difference being the version in the millenia makes more power.
What, and go to jail if I get caught ? Yah, right.
you need an on board diagnostic scaner
2.5L V-6 Mazda Millenia engine is a non-interference engine. If your timing belt pops, you will not damage your valves, like I did in my Diamante
The S denotes the 2.3 Supercharged engine one the Mazda millenia (rather than the regular 2.5)
Depends on Which Year and Which Engine (2.3 or 2.5) My 99 2.5L has 4 o2 PLUS a knock sensor
ENGINE COOLANT TEMP.SENSOR CIRCUIT
You can find an exploded view of the 1996 Mazda Millenia 2.5 liter engine at most Mazda dealerships. You can also find the exploded view in most Mazda service manuals.