Why won’t it shift out of high gear? 4.0L

2010 NISSAN FRONTIER
350,000 MILES • 2.4L • AUTOMATIC
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CHAT1978
I have a code for bad neutral safety switch and a code for loss of communication with TCM. When you put in drivetime it’s engaged in high gear and doesn’t shift.
May 23, 2026 at 11:42 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,487 POSTS
  • ASE Certified Mechanic
If you can give me the codes numbers it will help. I would start by checking the fuses for the TCM which are Fuses #22 and #14 in the fuse panel on the right side of the dash and fuse #49 in the fuse panel under the hood, make sure then have power as well with the key on.

https://www.2carpros.com/articles/how-to-check-a-car-fuse/

Please go over this guide and get back to me.
May 24, 2026 at 3:20 PM
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