99z28monster

iTrader: (3)

well I am currently having some issues with the old Z. I have a "service vehicle" light that comes on when I drive the car. I am currently getting two fault codes one of which is p0140 and I cant think of the other but it says misfire. The misfire is the one that is causing the light I am pretty sure since it goes away when I clear the DTC's. Also in the misfire it list it as premature I have no idea what it means though.
I have not noticed any power loss from the car or rough idle. Only issues right now is with my underdrive and serpentine belt. The only thing really recent that I did to the car is I deleted the PCV system.

The weather has been really wet due to constant rain here in Hawaii, I have noticed the problem since all of the rain has rolled in, dont really know if that makes a difference.

The car is a h/c car with full bolt ons already been tuned. Pretty much everything is new except my coils. Thanks in advice guys.

99z28monster

iTrader: (3)

any takers?

2001NBMZ28

Service vehicle is different from service engine soon, so thinking SES is what you mean. P0140 is 02 circuit insufficient activity bank 1 sensor 2 (post cat drivers side). Are you running 02 sims/were the codes tuned out? Don't know what a "premature" code means, thinking the code(s) would be either current or history. TTT for you.

99z28monster

iTrader: (3)

thanks, I had the rear o2's tuned out but I will go back and check it. I noticed while scanning that the light comes on after the o2 test is complete. So I am guessing this is the problem. Any how thanks for your time 2001NBMZ28

blk97z28

iTrader: (3)

ya sounds like that sesnor is the problem.

99z28monster

iTrader: (3)

Infact it was, I guess some how I had changed it turning on the rear o2 that isnt even on the car. Thanks for the help though guys