i have reflashed and even rewrote my computer and can not get these 4 codes to go away. they are 140, 160, 300 and 405. any reason why i wouldnt be able to delete this codes in particular. my car is a 99 z28 six speed. mods include all emission stuff deleted, lid, lts, ory, tsp 228r, weiand ls6 intake with a fast 90mm, ls6 patriot heads. i think thats about. any help would be greatly appreciated guys

 

140 and 160 are rear o2s they must not be shut off.
Double check this in your dtc's.

300 is engine misfire when cam is installed this happens.
need to set higher values or shut them of in your dtcs.

405 is egr position sensor if you have taken your egr stuff off you need to shut these off in your dtc's.

You have not shut these of the right way.

 

You need to edit the code behaviors in Engine Diagnostics,
not just "delete" them in the scan tool.

 

I know i cant just delete them guys, give me some credit. I have unchecked them in the engine diagnostic part and reflashed my car like that several times but the codes keep popping up. I wondering if i need do something besides just unchecking the box. I have also lowered the value on the knock sensor sensitivity I guess i still have to lower it more. just wanted some level of protection from detonation of course i am guessing i would hear it to and catch it. any other ideas guys

 

Unchecking the box ONLY makes the SES stay off, it doesn't stop or change the behavior of the error reporting otherwise.

 

really. I think i was misinformed then. can you clue me in as how to permanently rid myself of those so i can pass emissions my good man. thank you in advance.

 

ok can guys think i just figured it out. I didnt know you changed the part where the number is. I have changed the numbers to 3 no error reported and i'm guessing this is what i needed to do. thanks again guys i'll let you know if i pass

 

just curious i have rolled into emissions twice today and the guy told me the several reporting monitors were not ready. I drove my car at a steady state cruise to put it in a closed loop to hopefully trip the monitors. was this what i needed to do or do i need to alter my tune again. i changed the above stated codes to not report errors was this all i needed to do

 

Yes - I have a special load that I call No DTC, I set all the P codes to " 3 No Error Reported" and load it. once loaded, the car is fully ready for state inspection - all the test show complete.
thanks
Bill

 

My cat codes 420 and 430 are still in my pcm and I pass every year with mine. The state (at least GA where i live) only cares about the codes that set the SES light. Just unchecking the box keeps the code from setting the light. I would imagine other states run a similar thing??

 

That is they only thing I like about living in New Mexico, no state inspections, no emission inspections! But man we have some scarry looking things with wheels on them and people riding in them

 

funny texas. i am still telling other new yorkers they wouldnt believe what constitutes transportaition in new mexico.

 

I am not sure it is possible to describe sutch things, witnessing them can be a culture shock for sure. They puck out visable emissions that would make any sain American suck to their stomachs. Some times you just have to pull over and wait for the air to clear so you can see again

 

Why cant you shut off rear o2s? Sorry might be a newb question.