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Service engine soon light just came on on my 04 Expedition. She has 146,000 miles and this is the first light that has came on. I have done some research on the 2 codes that it is giving but wanted to see if anyone here has experienced this issue and what they did to fix it. I don’t want to start throwing parts at it. Thanks in advance for the help. Just to note, the light came on and there is no change on how it is running.
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Both of these codes are for lean. Check for vacuum leaks around the intake manifold
gaskets and pcv hoses. this link will show how to check for vac leaks. You could also
clean your maf.http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
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