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Will do this week! I also went ahead and ordered a replacement thermostat (to address the thermostate pending code which resolved when I checked it yesterday, along with the EGR pending code) just in case and will also do an EGR clean. Thanks for the help! Hope this fixes the monitors lol.

Ah, rip. So if all else fails, may have to buy a new battery and see if it changes anything. Would you happen to know of any other drive cycle information for getting the O2 and HCAT ready? I've been reading through different Mazda forums and watching youtube vidoes, but it seems most of it is...

Thanks! I did read that and was planning on doing that just in case. It seems pretty straight forward, thanks for the guide! So...that's the weird thing. There aren't any codes for HCAT or O2. I'm just not sure why the HCAT and O2 monitors are still marked as not ready, but everything else is...

Long time lurker here with an 08 gen one MS3. Only mods it has on it are a CARB legal COBB intake (since I'm in California). Basically, I can't pass smog for whatever reason. I keep checking codes, and I'm getting a pending code of P0401 and occasionally one for the thermostat, but it hasn't...

Hey all! It's been a while, I remember the old mazdaspeed forums from before. Glad to see things are still going! I was hoping to get some help with this issue I've been having. It started about 2-3 weeks ago. Pretty much, when in lower RPM's in 1st and 2nd gear (usually below 2500), the car...