I have a 2001 nissan xterra 3.3l v6 XE 4wd automatic with around 185,000 miles. I'll keep this short but to the point. Gone through 2, maybe 3 new batteries in the last 4 days, brand new alternator, new terminals, cleaned and checked all grounds. It won't run by itself at all but when it's being jumped it runs and sounds fine but within minutes of disconnecting cables it sputters then dies. The only thing on my dash is the ATP warning light... speedometer, rpms, gas, remp and mileage doesn't even show up. The codes I pulled are PO464(fuel level sensor a circuit intermittent) which says something about the connectors on top of fuel tank, which I have cleaned and PO500(speed sensor) I'm at the end of my rope on what to do or where to go next... I've watched over 500 videos and spent easily 20 hours researching what to do but I can't figure out what is going on