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(2002 Mazda Millenia)
in Jenkintown, PA on February 15, 2011
WHAT CAUSES THIS CODE AND What could cause a mis fir p300 code are thy related
Displaying 2 answers & 0 comments
Popular Answer
on February 15, 2011
air cooler bypass solenoid. no connection to the 300. you need a real diag to get to the bottom of both codes.

of Ambler Tire Co., Inc. on February 15, 2011
Fault is most likely a bad air charge solinoid,I have not seen this cause a missfire.Call us for an appointment ,We have dealer tooling for Mazda and we can check it for you.
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