BTW, what brand long tubes are they? PM me if you would rather not but that out on the forum.
Headers destroying front o2 sensors
Thread Starter
Advanced
Joined: Sep 2004
Posts: 62
Likes: 0
From: Belleville IL
Headers destroying front o2 sensors
I have long tube headers on my 02 Z and immediately after putting on the headers I was getting the 1133 and 1153 codes.
P1133 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
P1153 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1
I changed the o2 sensors to new Bosch units about 6 months ago, less than 2000 miles, and I am getting the 1133 and 1153 codes again. Does anyone else go through front o2 sensors this fast or is it just me? The only mods to the engine are the long tubes w/o cats and a Stinger intake.
This is really starting to frustrate me and I am seriously thinking if this is normal that I am going to have to put the stock exhaust back on. The car's acceleration is really "choppy" and not very smooth when these codes are occurring.
Ed
P1133 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
P1153 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1
I changed the o2 sensors to new Bosch units about 6 months ago, less than 2000 miles, and I am getting the 1133 and 1153 codes again. Does anyone else go through front o2 sensors this fast or is it just me? The only mods to the engine are the long tubes w/o cats and a Stinger intake.
This is really starting to frustrate me and I am seriously thinking if this is normal that I am going to have to put the stock exhaust back on. The car's acceleration is really "choppy" and not very smooth when these codes are occurring.
Ed
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
I can tell you that if its not tuned it prob running rich or lean (esp @ WOT) therefore messing up the frt o2's. Tune will fix it. I know I need one
Last edited by Corvette Don; Jun 17, 2007 at 12:47 PM.
Burning Brakes
Joined: Jan 2006
Posts: 1,170
Likes: 27
From: Magnolia Greens NC
I have long tube headers on my 02 Z and immediately after putting on the headers I was getting the 1133 and 1153 codes.
P1133 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
P1153 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1
I changed the o2 sensors to new Bosch units about 6 months ago, less than 2000 miles, and I am getting the 1133 and 1153 codes again. Does anyone else go through front o2 sensors this fast or is it just me? The only mods to the engine are the long tubes w/o cats and a Stinger intake.
This is really starting to frustrate me and I am seriously thinking if this is normal that I am going to have to put the stock exhaust back on. The car's acceleration is really "choppy" and not very smooth when these codes are occurring.
Ed
P1133 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
P1153 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 2 Sensor 1
I changed the o2 sensors to new Bosch units about 6 months ago, less than 2000 miles, and I am getting the 1133 and 1153 codes again. Does anyone else go through front o2 sensors this fast or is it just me? The only mods to the engine are the long tubes w/o cats and a Stinger intake.
This is really starting to frustrate me and I am seriously thinking if this is normal that I am going to have to put the stock exhaust back on. The car's acceleration is really "choppy" and not very smooth when these codes are occurring.
Ed
Melting Slicks
Joined: Sep 2004
Posts: 3,178
Likes: 13
From: N. County/San Diego
I replaced my GM 02 sensors on my crew-cab with Bosh sensors and continued to have sensor related codes and a slight miss, which is what I was trying to fix in the first place!
In the past I had a similar problem with non GM spark-plugs which was cured by going back to GM plugs, per the dealer`s suggestion, so that`s what I did with my 02 sensor problem, I replaced all 4 with GM sensors and never had another issue.
It may be bull-crap but the dealer said GM cars/trucks can be sensitive to non-GM sensors, plugs, etc, in my case apparently so..... your results may vary!
P.S. I recently had a slight miss in my C5 after a tune, turns out 1 sensor had a weak/erratic signal causing the other sensors to try and counter the bad one by going lean/rich. The problem reappeared awhile after the bad sensor had been replaced, turns out the other sensors were on the verge of being shot as well (they`re original in a 98), I just replaced the other 3 sensors with new GM sensors so we could rule out the 02 sensors as being a potential/future problem then re-tuned.
In the past I had a similar problem with non GM spark-plugs which was cured by going back to GM plugs, per the dealer`s suggestion, so that`s what I did with my 02 sensor problem, I replaced all 4 with GM sensors and never had another issue.
It may be bull-crap but the dealer said GM cars/trucks can be sensitive to non-GM sensors, plugs, etc, in my case apparently so..... your results may vary!
P.S. I recently had a slight miss in my C5 after a tune, turns out 1 sensor had a weak/erratic signal causing the other sensors to try and counter the bad one by going lean/rich. The problem reappeared awhile after the bad sensor had been replaced, turns out the other sensors were on the verge of being shot as well (they`re original in a 98), I just replaced the other 3 sensors with new GM sensors so we could rule out the 02 sensors as being a potential/future problem then re-tuned.
Last edited by Rag-Top Rick; Jun 17, 2007 at 08:42 PM.
Pro
Joined: Jun 2002
Posts: 726
Likes: 45
From: Marquette MI
You need to replace the front O2 sensors with rear O2 sensors and that requires a kit from LG Motorsports. Call Bobby and he can help you. I messed with this for a long time and finally fixed the problem per above.
Race Director
Joined: Aug 2004
Posts: 14,639
Likes: 39
From: Winston-Salem North Carolina
St. Jude Donor '08-'09
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Advanced
Joined: Sep 2004
Posts: 62
Likes: 0
From: Belleville IL
I do have the rear o2 sensors in the front locations.
Last edited by paxton50; Jun 18, 2007 at 10:37 AM.
Thread Starter
Advanced
Joined: Sep 2004
Posts: 62
Likes: 0
From: Belleville IL
Drifting
Joined: Dec 2005
Posts: 1,720
Likes: 3
From: East Hampton CT
I've had 02 problems with my LG Street headers even with the rear 02's installed in the front location with the adapters. However, I recently found out that Bosch has a 1yr warranty on their sensors from Autozone...so just keep returning and replacing them...unfortunately that's part of the problem of modding your car...decreased reliability.
Drifting
Joined: Oct 2002
Posts: 1,335
Likes: 76
From: Bedford Va.
You must have the heated o2 sensors in the front position.
This alone did not solve the slow response problem for me.
I drilled 6 small holes in the o2 sensor cover (bosch has 3 small slots).
you probably can just open the slots a little with a small screw driver.
Be careful not to damage the sensor by pushing the screw driver in to far.
I had my tune checked and it was good. the opening of the cover worked thru the winter months and still continues to work (9 months) with now slow response codes.
If I can find pics I will post them-try seach there in here somewhere
This alone did not solve the slow response problem for me.
I drilled 6 small holes in the o2 sensor cover (bosch has 3 small slots).
you probably can just open the slots a little with a small screw driver.
Be careful not to damage the sensor by pushing the screw driver in to far.
I had my tune checked and it was good. the opening of the cover worked thru the winter months and still continues to work (9 months) with now slow response codes.
If I can find pics I will post them-try seach there in here somewhere
Drifting
Joined: Dec 2005
Posts: 1,720
Likes: 3
From: East Hampton CT
There are mixed feelings on changing the sensor cover. Some people say there are more problems, others say it solved problems. I do know if you're getting "heater problems" from your 02 heater not working well, and you open the sensor up, you will be reducing the temp in the sensor rather than increasing it like the sensor wants. Remember, LT's have COOLER exhaust temperature due to the increased surface area for heat dissapation and farther location for the 02 itself from the engine. You'll want them to be getting HOTTER to properly oscillate, not cooler.
I might tweak my next Bosch with a screwdriver but drilling holes will prevent me from being able to return it.
I might tweak my next Bosch with a screwdriver but drilling holes will prevent me from being able to return it.
Drifting
Joined: Oct 2002
Posts: 1,335
Likes: 76
From: Bedford Va.
The problems with modified o2's are probably because they damaged the sensor inside the cover. you have to be very careful not to drop/bang the sensors around.
The modded sensor will see more heat. the cover is a sheild to protect the sensor.
some headers may have the bung position to far out of the exhaust stream.
yes the exhaust temp is cooler with headers. when the o2's are moved back in the system this just makes it worse.
The modded sensor will see more heat. the cover is a sheild to protect the sensor.
some headers may have the bung position to far out of the exhaust stream.
yes the exhaust temp is cooler with headers. when the o2's are moved back in the system this just makes it worse.
Thread Starter
Advanced
Joined: Sep 2004
Posts: 62
Likes: 0
From: Belleville IL
I've had 02 problems with my LG Street headers even with the rear 02's installed in the front location with the adapters. However, I recently found out that Bosch has a 1yr warranty on their sensors from Autozone...so just keep returning and replacing them...unfortunately that's part of the problem of modding your car...decreased reliability.
Does anyone else with the LG Street headers have this problem?
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
The reason that you are getting a insufficient activity or switching DTC is because the sensors has been relocated. In their original configuration in the exhaust stream they worked well within GMs intended strategy. GMs tight OBD2 tolerances which monitors sensor activity sees too much of a time lag between the sensors switching from < and > 450mV. Typically after a header installation I tune those codes out of the PCM calibration. It happens not only with LG headers but with others as well.
Drifting
Joined: Dec 2005
Posts: 1,720
Likes: 3
From: East Hampton CT
I do have an old spliced (front sensor to rear harness connector) AC delco sensor that I use when one of my bosch ones crap out and it works great...except that replacement Delco's are twice the price of a bosch.
For now, replacing the bosch every 6-12 months (for free) is ok with me since I'm under there for other stuff like oil changes anyway.
Steve has a good point however. For anyone who is having 02 problems and wants it FIXED for good, buy a DELCO sensor and you'll definitely have fewer problems than bosch.
