anyone have any trouble with CEL lights after putting on a y-pipe and have issues passing an OBDII Inspection....particlarly those in NY......and would a non-OBDII cat keep killing 02 sensors and throw codes.....i ask because my old maxima i sold to my brother and we replaced all 3 O2s and still getting 02 codes...another code was Knock Sensor but i said hold off until we get o2s replaced...so i reset teh ECUa fter changing 02s and CEL light came right back on.....do u think it could be teh cat not-being obdII..or y-pipe...i know post might be long and confusing but i am sick of trying to fix this car....anyone know where i can get some o2 simulators

 

What code are you getting from the latest CEL?

 

havent checked yet....it might just be the knock sensor....ill update later i got to have my brother check it

 

Does your car have California Emmisions?

 

Did you put an after market y-pipe which removes the precats? If so, you will need to either move your s2ndary o2 sensors behind the main cat, or get an o2 sensor simulator (o2sim.com, or cattman.com). If the car was purchased in NY new, it will have Cali emissions, and this will most likely be your problem... but check the trouble code before you dive into anything.

 

I've never heard this before.....anybody know what he is talking about?

 

I have WSP y-pipe and passed inspection no problem

 

Cali-emissions on a 98 in new york? didnt know that was possible.......

Also u have to relocate the o2 sensor or get some thing for it?

 

ok updaTE.....the car is a 96 FED emissions its my old car....it has a cattman y-pipe....the secondary 02 is after the cat....the new codes i am getting asre knock sensor...bank 1 sensor 1 and bank 1 sensor 1 heater malfunction.....i wanted to wait on the KS because i know it can be triggerd myu 02 codes.....the thing is i just replaced all 3 sensors....should i try replacing the current one with a code again....need help bad its almost year past inspection

 

I'm looking at a Stone Mountain Racing y-pipe and racing headers. Does anyone have any feedback on this name brand or if the headers will pass normal state emissions - not california -

 

This is not the place to ask that....Wait til you get 15 posts, please don't hijack threads, it's not a good way to start....

 

Check Your O2 Heater Fuse

 

are there separate ones for each bank??? and are they the fuse panel in the car or the big ones under the hood

 

heres a solution to your answer. GO TO YOUR CAR AND CHECK

 

how bout if u read its my brothers car.....i am out of town and i dont have my maxima with me

 

there is an o2 sensor per bank, and then the one after the cat.

I cant recall seeing fuses for the o2 sensor under the dash, so I'd assume it must be under the hood.

 

ok ill look tomorrow when i have access to a maxima........i have my g/f sentra with me now it m,ight be similar

 

ok new update.....cleared the ECU and 4 codes came back on the second start after clearing.....Knock Sensor.....Bank 1 Sensor 1......Banks 1 and 2 oxygen sensor heater circuit......now i have replaced all 02 sensors......and checked the heater fuses....like i said before the car has a y-pipe could this be causing the problems.....

 

First of all, you will not get by NY's OBD II "I/M Readiness test" with these codes. The heater circuit codes indicate an "open circuit" (read disconnected or cut wire) for the sensor heaters. You can also consider pulling the sensors and checking the heater circuit itself to see if it is out......

 

i know it wont pass inspection thats the whole point of this thread....but anyway.....my brother was an idiot and checked the wrong fuse for his o2 heaters.....turns after I FINALLY got my hands on the car today i looked it over and checked the right fuse and it was toast.....the dumb **** that installed the Air/Fuel gauge for me was probing all the wires and must of killed it........so....I REPLACED the fuse cleared the ECU and so far no codes....

FYI - Deezy...the heater fuse is under the dash...my brother checked the eccm fuses under the hood for some reason I dunno...hes not to strong in his automotive knowledge