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Discussion Starter · #1 ·
Hey everyone, i have a 2007 mazda 3 (non mazda speed) and i went cheap and got a MAF plug in pipe as well as a specture cone filter. i installed it and drove it fine yesterday until half way home i got a check engine light. anyone have any idea what’s causing this? there’s no leaks and keep in mind i also don’t have a heat shield on it.
 

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Discussion Starter · #3 ·
The first step with a CEL is to use an OBD-II reader to pull the code(s). If the CEL is flashing, safely stop the engine ASAP, then pull the code(s).

Entry-level OBD-II tools are inexpensive, but most auto parts stores will offer a free scan for codes.

i did, it said that my o2 sensor was running high (higher amount of intake volume with air) but when i put my stock intake back on it went away
 
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