Reasonably detailed how to for changing the oxygen sensors on a 2nd Generation (2009, 2010, 2011, 2012, 2013) Mazda 6 4 cylinder. Combined cost of sensors in…
2009 Mazda 6 – 02 Oxygen sensor replacement – how to
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Hi Taco, Yes, I was aware disconnecting the battery cleared the codes. I
went about 10 days before the same code returned. I then replaced the lower
02 sensor too with the same results. Net, net, the car apparently needs a
new catalytic converter for about $1200 installed. Frankly this ticks me
off since the car is a highway queen and had less than 100K miles on it.
So, no more Mazda’s for me, this is my first and last Mazda. I drive around
with the check engine light on – bummer.
Just to note, your check engine light went away because you unplugged the
battery. This cleared the code, but your computer still needs to analyze
run data for a while before the code comes back. Did you ever get a repeat
on the code?
Great video! Thanks for the tutorial on how to change the upper oxygen
sensor on the 2nd Generation Mazda 6.