Maybe you need to restore it buddy, btw, can yours read the long trim and short trim fuel? Lmk thanks!

 

my reads short and long trims.

 

In order forthem to work, the o2 sensors have to be working properly? Please let me know if im correct. Thanks!

 

fuel trims are set up by the ECU.
of course for the right values to be calculated and set - the O2 sensor should be in a good shape....

 

Thanks for reply, the reason why i asked is becuz my ultragauge is not reading any fuel trims at all, now i do have a cel for o2 bank 1. so im curious if thats why not reading any. If not, what problem it could be?