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My wife has a 09 Santa Fe and we were getting code p0464 fuel sensor circuit intermittent. I changed both parts that need replacing. After about 20 miles now code p0442 small evap leak detected. I can only assume that it is coming from the fuel sensors that were replaced. Is there anything that I could have screwed up on? Any help will be appreciated.
 

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The surface that the green o-rings sit on need to be clean,, when the unit lifted up, all the dirt/gravel falls down.. gravel dont compress and seal, it'll hold the module up and allow for vacuum leak during EVAP test

I take spray bottle with soapy water mix and wet down the dirty top of module and surrounding tank, then blow off with air hose so it a whole lot cleaner to work with.. remove green rings, wipe them, and use clean rag/towel to wipe surface around opening on tank free of dirt/stones
 
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