Yea, time for a new battery (it is from 2013). I'll get that tomorrow. So, I am thinking that getting the new battery wont solve the codes that I have now (P0031, P0037). In fact, if I get a new battery and don't do anything else, the new battery will begin to drain and corrode. Am I correct? Get the new battery and begin the process of elimination/testing. I was looking at the chart and it is labeled pretty good.

 

It all depends on if the battery is the cause of the corrosion. If someone filled the cells with tap water or anything other than pure distilled water than it could very well be the cause of the corrosion. If it we're me I would swap the battery, clean the terminals thoroughly with baking soda water mix to guarantee they're free of any sulferic acid residue, brush the terminal/lugs, clean the other end of the. ugs where they terminate on the starter and chassis/engine grounds, and any other supplemental grounds or connections for the IPDM fuse block next to the battery. (Inspectacular the bottom side of the IPDM for corrosion too)

Then hook everything up, clear all error codes that persist and start fresh.

 

You might be correct in that a new battery might not fix your problem. However, if you plan on keeping that car get the battery. Fix everything that is broken first, so you can remove any unknown variables and then move from there.

Do what cleric suggests first.

Then read the FSM for each of those codes and it will tell you which connectors to check, the terminals on the ECU, and everything you need. If you're not comfortable with it than bring it to a reliable shop or maybe even the dealer.

Just don't put a bigger fuse in or just swap the parts without testing the components themselves. Ask whatever place you bring it to as well to test the parts.

 

much thanks to both of you!!! Yes, I will get a new battery and then begin testing on my own. Anything to keep it out of the dealer...

 

Don't hate the Nissan dealership They're definitely good for some things.