[1621]

I just installed headers on the 6.1 this week and now I’m starting to throw codes. P0153 and 1333. I used the o2 extensions from jegs which I hear could be the problem. I also made sure they were plug into the right o2 wires from the car. I guess what I really want to know is if the o2 sensors are specific. Do the front o2 have a different part number then the rear o2 bc I could have placed the wrong o2 hole. I would also like to shut off my rear o2 in the car with the Diablo. Can anyone tell me where this feature is located when you install the tune? Is the option available in the "modify tune”? I do have the old version on the Diablo bc I heard the new Diablo’s do not give you the option to turn the rear o2 off.
Thanks chris

front and rear sensors are all the same part#.

P0153 / p0133 are primary o2 sensor codes, and are common for headers. they have a negative effect on closed loop motor operation. not sure whether the jegs o2 sensor extensions could be what's responsible for the front o2's setting codes. i have the same codes with my kooks headers, and they did the install for me as well - not sure which extensions they used.

what year is your jeep? what brand of headers did you get?

 

[1621]

I have an 07

i have an 07 too and got the same codes after installing kooks long tube headers. good luck getting rid of P0153 / P0133 and getting the rear o2 sensors ready to pass emissions - i haven't been able to pass in the 3 years since getting headers.

 

[1621]

mine runs ok. the exhaust tips do seem to get black faster, so it's possible that i'm running a bit rich and not getting ideal fuel injection in closed loop due to the codes. but my #1 concern is not being able to pass emissions. relocating the primary sensors upstream seems like it might work. even though it will only be keying off one cylinder, it may get hotter, and may react faster.

i'm subscribing to this thread, report back on what you find!