Purchased a 2010 Mazda3 Ground Touring as was needing something quick. Bad idea. Have since replaced the air conditioner and nearly put in what I paid, so I'm keeping it until it dies the horrible death it deserves. That being said the last issue was a 02 sensor circuit, slow response bank 1 sensor 02 engine code. Replaced the sensor and the code cleared for about three months and now it's back. It's possible it's a bad part but what else would keep tripping the sensor? TIA
dozens of things can cause that code something as simple as an engine it runs too rich or too lean or a driver circuit in the computer that's bad or an oxygen sensor that wasn't original equipment that won't last as long because the software doesn't see how it works since it's not a factory sensor. But do look for things like vacuum leaks we're not spark plugs first
@scottykilmer
Thank you kindly Scotty