Your check engine light is flashing on your Mazda millenia and the car is running real rough?

Answer 1

turn off engine and check oil level. If the oil is adequate and the car runs roughly you may have a dirty/faulty O2 sensor.

i dont think so. flashing ce lite means misfire, and if you continue to drive the car, permanent engine damage can result. oil level has NOTHING to do with it. O2 sensor is a very remote possibilty, but most common is a coil on a 2.3, and spark plugs on both. i did have one with a bad fuel injector. #5 cyl, too. which is a b*&^h to get to.

FLASHING is REAL BAD - Park it an Tow it to the repair place.

Steady is NOT BAD - Drive it to someplace and get the code.

Even Money -

The Millenias and their Commonwealth cousins the "Xedos" all suffered from the same issues in this area. 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 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 better than it ever did 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 of this results in a costly set of repairs.

Good Luck