Q: Which oxygen sensor usually fails first? I don't have a code reader to tell which one is bad.
I just wanting to know which o2 sensor is more likely to fail first as I do not have a code reader
My car has a manual transmission.
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Hi. In my experience, I haven’t really seen one oxygen sensor fail more than the other one. Considering the year of the truck, I would replace all the oxygen sensors on the truck because, if one is going bad, then the other oxygen sensors are right behind it.
Before you change the oxygen sensor, I would try and have the Check Engine Light diagnosed because what is causing the Check Engine Light could be something other than the oxygen sensor. I suggest you have a certified technician, such as one from YourMechanic, come and diagnosis your Check Engine Light and replace the oxygen sensor if needed.
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