I keep getting a check engine light on my 2005 Hyundai Santa Fe, code 133, which indicates the upper oxygen sensor on the rear manifold is lazy. I've changed it twice and can drive it about a day before the light comes on again, same code. What gives here?
Really ?
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What kind of gasoline do you use? I can only go by what dealers have told me so you decide if this is correct. Every time I have changed one (other than Hyundai cars also) they ask what kind of gasoline I use and am told if I use gas with alcohol in it will cause the oxygen sensor to go bad. I now try to avoid gasoline with alcohol in it and so far no problems.
thebax2006
Now it's time to buy a factory 02 sensor!
After market ones don't work on many vehicles.