Check engine light codes after header installation
Thread Starter
Le Mans Master
Joined: Oct 2006
Posts: 5,474
Likes: 3
From: Bradenton, FL & Chandler AZ
St. Jude Donor '09
Check engine light codes after header installation
I had headers installed several days ago. From the start the check engine light was on which we all figure were the 02 sensors despite the fact that I got high flow cats. Anyway, yesterday a fellow forum member pulled the codes for me. These are P0036 (HO2S heater control circuit bank 1 sensor 2), P0054 (HO2S heater resistance circuit bank sensor 2), and P0141 (HO2S heater performance bank 1 sensor 2).
I guess the HO2S before each verifies O2 sensor involvement, but am I correct in assuming there is only one of the sensors involved since all the codes are bank 1 sensor 2. If this is the case, why is only one going off and not the other?
Thanking you in advance for your input and thanks to Steve for pulling these codes for me.
I guess the HO2S before each verifies O2 sensor involvement, but am I correct in assuming there is only one of the sensors involved since all the codes are bank 1 sensor 2. If this is the case, why is only one going off and not the other?
Thanking you in advance for your input and thanks to Steve for pulling these codes for me.
Last edited by Oli1313; Dec 16, 2006 at 11:46 AM.
Pro
Joined: Jun 2005
Posts: 730
Likes: 0
From: Winter Springs FL
I threw a CEL upon initial installation too. However, I attributed it to the excessive amount of smoke that burned off the header & pipes after initial start up. After the smoked cleared, I reset the CEL. It's been fine since. 
Instructor
Joined: Mar 2006
Posts: 123
Likes: 0
From: az
do not get a tune just to solve these codes. just like it was posted previous, either the o2 wire(s) burned, not plug in or bad o2. you can use a tune to turn any code off, but that should be the last option. it is not wise to use a tune to turn off a code if the cause is burned wire and not fix / replace the wire. good luck to you.
Thread Starter
Le Mans Master
Joined: Oct 2006
Posts: 5,474
Likes: 3
From: Bradenton, FL & Chandler AZ
St. Jude Donor '09
do not get a tune just to solve these codes. just like it was posted previous, either the o2 wire(s) burned, not plug in or bad o2. you can use a tune to turn any code off, but that should be the last option. it is not wise to use a tune to turn off a code if the cause is burned wire and not fix / replace the wire. good luck to you.
I will be taking a look at it tomorrow morning. I always thought I was going to tune it sooner or later, but I do have OCD when it comes to my car and I will not get it tuned until I know it is perfect otherwise.
Thanks to all for your help.
Thread Starter
Le Mans Master
Joined: Oct 2006
Posts: 5,474
Likes: 3
From: Bradenton, FL & Chandler AZ
St. Jude Donor '09
Well, NOT HAPPY AT ALL TODAY!
Got under the car and realized that the post cat o2 sensor slots were welded shut! The O2 sensor cable was tucked in on the right and there is not even post cat 02 sensor on the left which is the reason the code is shooting. Very upseting. I do understand that a tune will fix all these as it will turn the o2 sensors off, but still wanted a quality installation which I am unsure I got. My installer knows I was going to do the tune after a honker install and maybe this is the reason why the o2 were welded shut. Anyway, I was assure that the codes will not go away even with the missing sensor replaced which I disagre with since only the missing sensor code is lighting up. I will be picking up this 02 sensor from my installer and replacing it. I jut want the car correct before any new mods go on or the tune. What do you guys think?
Got under the car and realized that the post cat o2 sensor slots were welded shut! The O2 sensor cable was tucked in on the right and there is not even post cat 02 sensor on the left which is the reason the code is shooting. Very upseting. I do understand that a tune will fix all these as it will turn the o2 sensors off, but still wanted a quality installation which I am unsure I got. My installer knows I was going to do the tune after a honker install and maybe this is the reason why the o2 were welded shut. Anyway, I was assure that the codes will not go away even with the missing sensor replaced which I disagre with since only the missing sensor code is lighting up. I will be picking up this 02 sensor from my installer and replacing it. I jut want the car correct before any new mods go on or the tune. What do you guys think?
Drifting
Joined: Jul 2005
Posts: 1,533
Likes: 0
From: az
Well, NOT HAPPY AT ALL TODAY!
Got under the car and realized that the post cat o2 sensor slots were welded shut! The O2 sensor cable was tucked in on the right and there is not even post cat 02 sensor on the left which is the reason the code is shooting. Very upseting. I do understand that a tune will fix all these as it will turn the o2 sensors off, but still wanted a quality installation which I am unsure I got. My installer knows I was going to do the tune after a honker install and maybe this is the reason why the o2 were welded shut. Anyway, I was assure that the codes will not go away even with the missing sensor replaced which I disagre with since only the missing sensor code is lighting up. I will be picking up this 02 sensor from my installer and replacing it. I jut want the car correct before any new mods go on or the tune. What do you guys think?
Got under the car and realized that the post cat o2 sensor slots were welded shut! The O2 sensor cable was tucked in on the right and there is not even post cat 02 sensor on the left which is the reason the code is shooting. Very upseting. I do understand that a tune will fix all these as it will turn the o2 sensors off, but still wanted a quality installation which I am unsure I got. My installer knows I was going to do the tune after a honker install and maybe this is the reason why the o2 were welded shut. Anyway, I was assure that the codes will not go away even with the missing sensor replaced which I disagre with since only the missing sensor code is lighting up. I will be picking up this 02 sensor from my installer and replacing it. I jut want the car correct before any new mods go on or the tune. What do you guys think?
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Safety Car
Joined: Jun 2004
Posts: 4,430
Likes: 81
From: Whidbey Island WA
Thats wrong on many levels. I would make them pay for the fix at another shop and if they balked I would be consulting with an attorney. Its the principle of the thing. Welding up that 02 is over the top to say nothing of the clearly shoddy work they did. You should post the name of the shop here and in the regional section for that area so others dont have to go through this unfortunate experience.
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Well, NOT HAPPY AT ALL TODAY!
Got under the car and realized that the post cat o2 sensor slots were welded shut! The O2 sensor cable was tucked in on the right and there is not even post cat 02 sensor on the left which is the reason the code is shooting. Very upseting. I do understand that a tune will fix all these as it will turn the o2 sensors off, but still wanted a quality installation which I am unsure I got. My installer knows I was going to do the tune after a honker install and maybe this is the reason why the o2 were welded shut. Anyway, I was assure that the codes will not go away even with the missing sensor replaced which I disagre with since only the missing sensor code is lighting up. I will be picking up this 02 sensor from my installer and replacing it. I jut want the car correct before any new mods go on or the tune. What do you guys think?
Got under the car and realized that the post cat o2 sensor slots were welded shut! The O2 sensor cable was tucked in on the right and there is not even post cat 02 sensor on the left which is the reason the code is shooting. Very upseting. I do understand that a tune will fix all these as it will turn the o2 sensors off, but still wanted a quality installation which I am unsure I got. My installer knows I was going to do the tune after a honker install and maybe this is the reason why the o2 were welded shut. Anyway, I was assure that the codes will not go away even with the missing sensor replaced which I disagre with since only the missing sensor code is lighting up. I will be picking up this 02 sensor from my installer and replacing it. I jut want the car correct before any new mods go on or the tune. What do you guys think?
Instructor
Joined: Mar 2006
Posts: 123
Likes: 0
From: az
please post the name of the shop so no one else get burn by this place. i think you should tell this shop that you are considering calling the EPA since you paid them for the high flow cat and they did this...totally 
.....in the mean time, this shop better hope your computer doesn't get fry....good luck bro.
.....in the mean time, this shop better hope your computer doesn't get fry....good luck bro.
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Thats wrong on many levels. I would make them pay for the fix at another shop and if they balked I would be consulting with an attorney. Its the principle of the thing. Welding up that 02 is over the top to say nothing of the clearly shoddy work they did. You should post the name of the shop here and in the regional section for that area so others dont have to go through this unfortunate experience.
No excuse for that at all.please post the name of the shop so no one else get burn by this place. i think you should tell this shop that you are considering calling the EPA since you paid them for the high flow cat and they did this...totally .....in the mean time, this shop better hope your computer doesn't get fry....good luck bro.
.....in the mean time, this shop better hope your computer doesn't get fry....good luck bro.
Thread Starter
Le Mans Master
Joined: Oct 2006
Posts: 5,474
Likes: 3
From: Bradenton, FL & Chandler AZ
St. Jude Donor '09
Well known local shop with good reputation. A sponsor of this site. Anyway, I will give them a chance to get it all fix before I seek legal advice... oh, wait! My wife is an attorney!
Will keep all of you posted.
Will keep all of you posted.
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Thread Starter
Le Mans Master
Joined: Oct 2006
Posts: 5,474
Likes: 3
From: Bradenton, FL & Chandler AZ
St. Jude Donor '09
Safety Car
Joined: Dec 2004
Posts: 3,565
Likes: 5
From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
thank you mistress, may i have another.
Drifting
Joined: Sep 2004
Posts: 1,551
Likes: 4
From: Livingston Texas
I have had headers installed for over a year and I have never had a CEL. Yes I have a tune but the codes are not turned off. If you know how to install a O2 sensor without ruining it I see no reason to turn off the codes.