Eletrical issues

[lamarbk]

So I have a couple eletrical issues happening,
1. The car sometimes does not recognize that the key is in the vehicle, even when I insert it into the little slot in the center counsel,
I have replaced the battery and still does it with both keys, even takes like 20 button pushes to get the car to unlock or lock

2. All of a sudden my AWD will not work, a message pops up and says awd off, no wrench light is on, and the only MIL codes I have is for an O2 sensor running lean on bank 2, I have checked trans fluid and it was a little low so I topped it off, still doesn't work, I have no noise in the PTU or rear end,

3. Rear camera intermittently works,

4. Today I started the car and it said steering assist not working, so no power steering, but the power steering rack was just replaced and reprogrammed by a dealer, as soon as I shut the car back off and turned it back on, the message went away and power steering was back and working again,


I suck at eletrical issues.. where do I need to start diagnosing this nightmare of a problem

 

[Action]

Welcome to the LOG.

How many miles?

Electrical issues have diagnostic procedures that are outlined in the shop manual. If you are going to do the repair or diagnosis you might consider the shop manual set. Or contract the diagnosis to a shop with the tools and diagnostic equipment.

Must of the vehicle systems are connected. Pull DT codes if the check engine light is on.
Then repair these issues until the light is no longer lit. (Work from the known to the unknown)

4) If this was an isolated one time event, let it go. If it occurs more times take it back to the shop.
3) Likely a loose connection or dirt in the sensor/wiring in the rear. This will involve checking for signal along the wiring.
2) The transfer case or PTU has a small amount of fluid. A small loss of fluid will render that inoperative. This is separate from the transmission.
1) My Key Remote start has a trouble shooting section in the owners manual. (Page 76)

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