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I have had this code before. I purchased this 2018 Trax about 19 months ago and I love this car. Within the first six months, I had this code. I replaced both O2 sensors, which tested bad. I feel like I did not fix the cause, I fixed the result of the problem. There is a long list of things that could cause this code. anybody have a clear answer to a "cause" of the problem???
 

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First thing to check is the intake to make sure you have no leaks. Check clamps, MAF seated properly, plastic intake for cracks, air filter for vermin nest.
 
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