O2 Sensor Problem w/ Dynatechs Installed

Ok I think this is where I should post this...

I have the Dynatech Headers on my AV and keep blowing my rear O2's... I have gone through 6 in 2 months now. I put a new one in.. reset the PCM with the Superchips and within a week or 2 I get the SES light again and pull up code P0157- low voltage sensor 2 bank 2. What gives?? I have replaced them even tried the O2 sims and the sims cause 3 diffrent codes.. P0153,P0155,P0159

Can anyone steer me in the right direction?? I am sick of that SES light and now my A/F guage bounces wildly from rich to lean and I am almost ready to take it out because of how anoying it is. Please help me...

Bonedog

Quote:

---

Originally posted by bonedog@Jul 30 2004, 01:47 PM
Ok I think this is where I should post this...

I have the Dynatech Headers on my AV and keep blowing my rear O2's... I have gone through 6 in 2 months now. I put a new one in.. reset the PCM with the Superchips and within a week or 2 I get the SES light again and pull up code P0157- low voltage sensor 2 bank 2. What gives?? I have replaced them even tried the O2 sims and the sims cause 3 diffrent codes.. P0153,P0155,P0159

Can anyone steer me in the right direction?? I am sick of that SES light and now my A/F guage bounces wildly from rich to lean and I am almost ready to take it out because of how anoying it is. Please help me...

Bonedog

---

My A/F guage always goes back and fourth, that's normal. Are
you sure the O2 are going bad ? Is your a/f hooked to that sensor?

The SES light comes on and when i scan the code I get P0157. I replace the sensor and a few weeks later BAM 157 again.. I am sure its the sensor.. I even took it to the dealer(BIG Mistake) and had the guy check it with a Tech2 and he replaced the O2 according to what the TechII told him..

No the A/f gauge is conected to the front O2 before the cat on the passengerside

Get a nelson tune, and have him delete the rear 02 sensors.

You sure a cat isn't bad...

my wifes truck was doin that .the truck only has 16,000 miles on it and it was a bad cat..they had the damn truck and her in a rental for a week..changed the cat and whatever else they did the truck runs way better than it ever has.

I don't think it would be the cat... The headers came with two brand new cats. This code came on like 2 or 3 days after the header install. Could they have sent me a bad cat??

ah dude...did you get that dynatech supermaxx long tube header system complete...i've been looking at that system and it looks great for 1199.00 :jump:

yea it was the complete system.. headers, cats, Y-pipe and everything else that comes with it..gaskets/clamps/wires/nuts/bolts...


I just can't figure this out... Guess i will have who ever I go with for a PCM upgrade just shut the rears off so I don't have that stupid light.

yea...that will prolly be your best bet...what did you put on the end of the system and how does it sound...what about hp and torque...any difference....