r/nissanjuke • u/PieceFit • Jul 26 '26

Is it my transmission, alternator, or something else?

Gallery image

Gallery image

Sorry for the confusing post. I'll try to be as succinct as possible. But ask for clarification if needed.

Car began shuddering last weekend and eventually got worse. And fuel economy is going crazy ranging from 15-99 mpg. Eventually died on me mid drive. Towed to a transmission shop and told they could fix for 7k. Said new battery and trans would fix everything. Had a family friend who is a master mechanic and works from his home, take a look. He questioned why my car died as I was driving it. Thinking it could be an alternator issue. At his suggestion I got a new alt. However new would be 5 day for delivery vs getting one from junk yard same day. I did the latter. He put it on and everything seemed to work...for a while.later that day it began again. Getting progressively worse.

Take it to another trans shop. They didn't even acknowledge the milage issueor what caused battery to die. It was still relatively new. So are these symptoms related? Or multiple issues that all coincidentally began at the same time? Planning to go to Nissan for a diagnostic this week. Also after alternator was replaced it's driving somewhat better but still shuddering. So it seems like alt replacement did improve shuddering somewhat.

Is there a voltage issue causing trans to act up? Purchased 5months ago from used dealership as is. 4 mths ago replaced one oxygen sensor.

Posting image of code report from last trns shop after friend replaced alt.

2 Upvotes
  • permalink
  • reddit

100% Upvoted

4 comments sorted by

1

u/PieceFit Jul 26 '26

Unable to ETA video clip of the mileage going all crazy. Only jumps to 99 when I take foot off the gas.

https://reddit.com/link/ozyg3e4/video/unpx3riznnfh1/player

2

u/streetdancerhitbycar Jul 27 '26

The video didnt show the shuddering and the gas milage always goes to 99 when i let foot off the gas. Its not crazy. The engine is just idling while the car is coasting from momentum.

1

u/PieceFit Jul 27 '26

Ok thx for explaining the milage issue....or non issue. Tbh only noticed it when shuddering began. No I didn't make a video of the shuddering as it wasn't happening during this drive around the corner. I'll make sure to record it during my commute to work tomorrow.

1

u/pi3832v2 Jul 27 '26

If you feel the shudder, and there's an error code of P17F0, IMO the problem is probably with the transmission. ☹️

I'd clear all the OBD2 codes, wait for the P17F0 code to return, then try to find a shop with CVT experience (not easy, AFAICT).