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For easier viewing/printing, I've wrapped up the diagnostic flow charts for both codes 7 and 43 into a PDF file. Download the PDF file here:https://goo.gl/Q8AJzu
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If it's just 43 now, this would be a problem with the heated oxygen sensor. I would recommend running through the flow chart I provided to ensure the circuits are good before replacing anything.
Hi! I noticed this thread was still open, so I wanted to check in and see if there was anything else I could do for you on this issue? Any other questions you had? Was there something you wanted addressed that I may have missed in my answer? Did you find my answer helpful?