Originally Posted by nick_auto96
I've been having problems with my car lately. Few weeks ago my check engine light came on. I'm like wtf, checked the code and it was TPS(throttle position sensor). I checked the TPS with an ohmmeter by following the steps on haynes manual and the readings were within the spec(500 ohm closed and 4k ohm on WOT). I just cleared the code and didn't bother to get it checked since it was running as usual. After few days check engine light came on again and it showed different code-which was A/T fourth gear signal fault. Right now my transmission acting wierd and only first and third gears are working(I have an auto). I also checked code from transmission Control module with OD light blinking and it decoded as TPS. My MPG as gone down from 24 to 19.5 cause engine is in the 3K+ RPM range on the highway.
Right now I don't know what to do- should I just go ahead and change TPS?
OR is it something else? Please help cause I can't afford to waste money on unnecessary things anymore
The whole 4th gear thing is a sign of doom, basically. Got that on my last two transaxles right before they became inoperable. Change out the TPS as a first measure.
Are you still on the original solenoids? Nissan released a TSB about them and an updated set, could cause trans damage.
My first three transaxles were brought down by bad solenoids (or previous abuse. who knows. I know the lastone was bad solenoids). It caused the trans to slip until the friction material literally wore completely off of the clutch plate, and welded it to the steel plate (I have pics if anyone is interested, still have the plates sitting here).
If you're still on the originals, it's worth the ~$150 for piece of mind to change them out.