FRONT o2s not working after header install? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Joseph1LE · 09-14-2015, 06:19 AM

Ever since I installed my headers on Saturday I've been getting codes for both front o2 sensors. I had codes for the rears as well but those got deleted when I got tuned last night and now I just have codes for the front still. Tuner was saying that they weren't showing any activity at first while he was tuning, but shortly after he said that they kicked on and he didn't have any issues for the rest of the tuning session. So we finished up and I left and only a couple minutes later I get a CEL again for both front O2s. Anyone else experienced this before? Did both O2s just crap out on me for some reason after the headers went on?

MoeIv · 09-14-2015, 06:28 AM

Mine crapped out a few months later

2010reddevil · 09-14-2015, 08:53 AM

Time for some new ones. Buy them from Walmart. Cheap as hell from there.

Synner · 09-14-2015, 09:01 AM

The pins are easily bent at the connector and will go flat and not engage. Check that before buying new, both going out the same day is not normal.

Jason 98 TA · 09-14-2015, 11:26 AM

Agree with that! Check your connections. We tons of headers and very seldom do I hear anything like that.

Jason

Tenring · 09-14-2015, 11:47 AM

What codes are you getting?

Do you get the issues resolved from your other thread?

Joseph1LE · 09-14-2015, 12:36 PM

Quote:

Originally Posted by Tenring

What codes are you getting?

Do you get the issues resolved from your other thread?

I'm getting codes for heater circuit on both sides. Bank 1 sensor 1 and bank 2 sensor 1. Did not resolve the issue from the other thread yet, but hopefully today I can do that.

frack · 09-14-2015, 12:58 PM

Somebody, correct me if I am wrong, but when you install longtube headers you are placing the 02 sensors further down range which would cause the front 02 sensors to throw a code. This is because they are further away and take longer to heat up. Now your car is basically not detecting anything, because it does not have time enough to heat up. When you have the car tuned the tuner will delete the rears all together and basically tell the computer to wait longer so the front 02's have time to heat up. Sounds like tune problem. However, I have had 02's go bad during installs too. It happens. Usually, just one not two.

Joseph1LE · 09-14-2015, 06:17 PM

Quote:

Originally Posted by frack

Somebody, correct me if I am wrong, but when you install longtube headers you are placing the 02 sensors further down range which would cause the front 02 sensors to throw a code. This is because they are further away and take longer to heat up. Now your car is basically not detecting anything, because it does not have time enough to heat up. When you have the car tuned the tuner will delete the rears all together and basically tell the computer to wait longer so the front 02's have time to heat up. Sounds like tune problem. However, I have had 02's go bad during installs too. It happens. Usually, just one not two.

This is correct. I spoke to my tuner and he said he had a brain fart and forgot to make this adjustment. So he will do that tomorrow.

Bodywerks · 09-14-2015, 06:39 PM

I agree that the connectors behind the heads are a PITA to get to and could easily just not be completely connected.

Joseph1LE · 09-14-2015, 07:34 PM

Quote:

Originally Posted by Bodywerks

I agree that the connectors behind the heads are a PITA to get to and could easily just not be completely connected.

Yeah I am still going to check this. Just didn't get a chance to today.

christianchevell · 09-14-2015, 07:45 PM

Yes the code most likely is a Delayed reading code for the front 02s as the response is slower as they are farther down stream and deleting the CEL code is a must in the programming, I had it happen to mine in about 20 miles, just returned to tuner and he did twenty seconds worth of hp tuning as he knew right where to go..... Some never have the code on some headers is the deal though supposedly.

09-14-2015, 06:19 AM	#1
Joseph1LE Drives: 2015 Camaro SS 1LE, 2001 Camaro SS Join Date: Jun 2015 Location: Miami Posts: 836	FRONT o2s not working after header install? Ever since I installed my headers on Saturday I've been getting codes for both front o2 sensors. I had codes for the rears as well but those got deleted when I got tuned last night and now I just have codes for the front still. Tuner was saying that they weren't showing any activity at first while he was tuning, but shortly after he said that they kicked on and he didn't have any issues for the rest of the tuning session. So we finished up and I left and only a couple minutes later I get a CEL again for both front O2s. Anyone else experienced this before? Did both O2s just crap out on me for some reason after the headers went on? __________________ 2017 GMC Canyon All Terrain- daily driver/dirt bike hauler 2015 Camaro SS 1LE- sold 2001 Camaro SS SOM M6- sold 1999 Firebird Formula A4- sold

09-14-2015, 08:53 AM	#3
2010reddevil Drives: 2010 Camaro 2SS Victory Red 6M Join Date: Apr 2015 Location: Gulf Coast, TX Posts: 1,424	Time for some new ones. Buy them from Walmart. Cheap as hell from there. __________________ 2011 2SS 6A Red Jewel Metallic, Vararam Tune CAI, Magnaflow 3" Competition c/b, Speed Engineering 1-7/8 LT's, Circle D 5C, M/T 275/40R20 S/S, HPTuners tune by Ryan@GPI 12.3 @ 112 ACM as of 12/22/19 Gone on 12/28/19 R I P 2010 2SS 6M Victory Red/Black (old ride) CAI intake, Speed Engineering 1 7/8" LT's, X4 base tune, Flowmaster Outlaw axle-back. 12.6 @ 115 SAR as of 9/19/15 Gone but never forgotten.

09-14-2015, 12:58 PM	#8
frack Drives: 2010 Inferno Orange SS Join Date: Sep 2014 Location: United States Posts: 120 View My Garage	Somebody, correct me if I am wrong, but when you install longtube headers you are placing the 02 sensors further down range which would cause the front 02 sensors to throw a code. This is because they are further away and take longer to heat up. Now your car is basically not detecting anything, because it does not have time enough to heat up. When you have the car tuned the tuner will delete the rears all together and basically tell the computer to wait longer so the front 02's have time to heat up. Sounds like tune problem. However, I have had 02's go bad during installs too. It happens. Usually, just one not two.
$frack is offline$

09-14-2015, 06:39 PM	#10
Bodywerks Drives: 2015 2SS/RS/1LE Join Date: Feb 2015 Location: Tucson Posts: 866	I agree that the connectors behind the heads are a PITA to get to and could easily just not be completely connected. __________________ 2015 SS/RS/1LE HSA delete, VMAX throttle body, CAI inc. Intake, PRC255 heads, BTR 660 springs, BTR cryo-treated rockers, PAT G 232/240 .654/.626 110+2, johnson 2110's, Manton 502 pushrods, C5R, Melling high volume/high pressure, Powerbond 25% underdrive pulley, Proform covers, Kooks stepped headers, catless mids, Doug Thorley exhaust. 512rwhp, 446rwtq on a mustang dyno, tuned by Cunningham motorsports.

09-14-2015, 07:45 PM	#12
christianchevell old school chevy rodder Drives: 2021 zl1 a-10 WildCherry Join Date: Jul 2012 Location: Oregon Posts: 5,622 View My Garage	Yes the code most likely is a Delayed reading code for the front 02s as the response is slower as they are farther down stream and deleting the CEL code is a must in the programming, I had it happen to mine in about 20 miles, just returned to tuner and he did twenty seconds worth of hp tuning as he knew right where to go..... Some never have the code on some headers is the deal though supposedly. __________________ 2021 Wild Cherry ZL1 A10, Sunroof, Data,Red Carbon Interior, Nav, RotoFab Big Gulp , Elite x2ultra, Borla ATAK, Driveshaft shop, BMR susp, Speed covers, intercoolers, ATI , 2650 MAG, DSX lid, 103 NW, TSP Longtubes & cats, LPE, 1le mods, ,LME cover, Katech pump and chain, Trunnions, BTR stage 2, LPE boostapump, Gforce, Speed eng , Granetteli, etc etc

09-14-2015, 06:28 AM	#2
MoeIv Drives: IOM 2SS/RS Join Date: Dec 2011 Location: Qatar Posts: 702	Mine crapped out a few months later

09-14-2015, 09:01 AM	#4
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,542	The pins are easily bent at the connector and will go flat and not engage. Check that before buying new, both going out the same day is not normal.

09-14-2015, 11:26 AM	#5
Jason 98 TA Drives: Camaro Join Date: Apr 2009 Location: Texas Posts: 1,670	Agree with that! Check your connections. We tons of headers and very seldom do I hear anything like that. Jason

09-14-2015, 11:47 AM	#6
Tenring Drives: 2015 SS/RS M6 Commemorative Join Date: Apr 2014 Location: Arizona Posts: 2,211	What codes are you getting? Do you get the issues resolved from your other thread?