Hey so i just bought my jeep and it was throwing multiple codes, I pluged it into my scanner and found out it was the radiator fan relay, a/c clutch relay, the O2 sensor was unplugged, the EVAP purge solenoid, and the nuetral saftey switch.

I fixed all the problems expect the evap solenoid and the NSS (havnt bought them yet) but when I plug my scanner in it reads code P0121 TPS pedal position.... any ideas on how to fix that or waht to do?

Truck is a 99 xj Sport 4DR 4.0L I6

 

All I can tell you is I got a code 121 and 123 a few weeks back (as well as high idle speed on start up, lock up torque converter not locking up and cruise control not working).

I replaced the TPS and that didn't fix it. I cleaned the inside of the throttle body with carb. cleaner and a toothbrush.

Right now its running fine again (no codes and everything works) with the original TPS re-installed.

There was a black ring of crud built up in the throttle body. That's what the carb cleaner and toothbrush cleaned out.

 

NSS can be cleaned (I guess you have not yet priced a new one!)

http://www.jpmagazine.com/techarticl...tch/index.html

 

yea my friend works at a wholesale autopart store so i ordered a new NSS and im gunna see if that solves my problem, ill let you know how it goes.
Thanks for the help guys!

 

for the purge sol. the pcm probably needs to be updated with new software.the code is P0443? evap purge circuit? there is an update