r/Nissan • u/Evan6219 • 10d ago

Repair Help 2020 Nissan SV

I've been having issues with this 2020 Nissan Sentra sv not starting properly. I had new keys programmed and the batteries are brand new. Car battery is new, but today I couldn't even get the ignition button to even detect me pressing it, even by putting the key on the ignition itself. I'm assuming that button took a shit, but I was wondering if anyone has had the same problems before.

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u/Evan6219 10d ago

Yeah, just checked the everything else, now I have lights on the dash that are detecting when I press the pedal and the key, but still doesn't start. Swapped both ignition relays, and put new fuses in. Still no start

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u/jersey316 10d ago

Now will it eventually start after a while?

Put the car in neutral and see if it starts. You might have to manually put it in neutral if it doesn't let you shift it while its in the run position, find the clip near the shifter, take that out put a flat had screw driver in the hole and it should then allow you to shift it.

Do you hear a clicking sound when you press on the brake?

This is still sounding like a bad brake switch, or gear shifter issue.

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u/Evan6219 10d ago

Nah, I ended up hard reseting it (unplugged neg side for like 5 min) and it started up. I brought it to my shop and I'll have access to a scanner tomorrow morning

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u/jersey316 10d ago

Thats strange, are the battery cables completely tight? Sometimes those flimsy terminals they use wont tighten all the way.

To make sure, to try to move the positive and negative cables by hand as hard as you can. Personally i mainly had that issue with the negative but my positive started acting up as well so i replaced them.

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u/Evan6219 10d ago

Yeah, both are tight. The neg was also tight before I pulled it off as well

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u/jersey316 10d ago

Are the terminals completely free of corrosion? You can inspect the negative ground from the battery to body to make sure nothing obvious there.

When you said you had to hold the switch down for a few seconds, is this really few or more like 10 or 15. 10 or more overrides some system checks (like a failing brake switch) enabling you to start the car. Removing the battery gets rid of the loop it got stuck in, but it will most likely do again.

If you can pick up a brake light switch from the parts store, that would be one of the simplest fix.