Question about 1996 Toyota Tacoma
My engine light is on and the codes are telling me its the O2 sensor and/or the egr valve....
how do i determine WHICH one it is and how do i fix it?
Codes do not tell you what is wrong. They only tell you if there is a problem with a specific system/circuit.
From the information you have given it sounds like you might have a problem with the EGR valve which is causing the O2 sensor codes. There is no way to tell for sure but this is probably the most likely cause of your problem.
Here is a website that has a lot more information along with videos about how different sensors work:
Posted on Dec 04, 2008
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Posted on Jan 02, 2017
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