how many miles? 02's are not ment to last over 60 thou and 20 years. 
O2 Sensor Help
Thread Starter
Pro
Joined: May 2015
Posts: 609
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From: Milton Florida
St. Jude Donor '16
O2 Sensor Help
I have a 96 CE with LT1 and it has just started throwing codes for bank 1, sensor 1 and bank 2, sensor 2 failures. Not sure why I would get failures on both banks at the same time. Any suggestions on where to start before I just start replacing parts? 
Thread Starter
Pro
Joined: May 2015
Posts: 609
Likes: 22
From: Milton Florida
St. Jude Donor '16
Codes are P0131 and P0157. Forgot to mention that the car is running rough, also. Not sure if they are original O2 sensors.
Last edited by Fastnail; Dec 18, 2015 at 04:02 PM.
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I would go ahead and change all four and inspect the wires. good time to pull the knock sensors and do a proper flush. orielys have a 02 socket set for 20 deposit or 25 to buy use the short one on the pass side front. I would also do the fuel filter change since your under there. take both lines loose behind the filter off the use the cheap tool to release the lines from the top. pull it out the top then remove the filter. have it low on fuel or disconnect the fuel line from the tank. so you don't get a bath.
I put in new knock sensors they have the right dope and torque to 14 lbs I believe but make sure.
still have not heard how many miles.
I put in new knock sensors they have the right dope and torque to 14 lbs I believe but make sure.
still have not heard how many miles.
Last edited by antfarmer2; Dec 18, 2015 at 04:44 PM.
Le Mans Master
Joined: Oct 2002
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From: Las Vegas - Just stop perpetuating myths please.
I dont why u expect to fix anything w/o proper diagnosis? Buy even a Chiltons or Haynes manual and check the codes for diagnosis charts. Even a dealer $100 diagnose fee will be cheaper in the long run.
P0131 and P0157 are both O2 sensor low voltage. Which means they all went bad at the same time - unlikely. More likely your running lean or have air leaks into the exh sys - not out. Next or last would be a PCM failure.
P0131 and P0157 are both O2 sensor low voltage. Which means they all went bad at the same time - unlikely. More likely your running lean or have air leaks into the exh sys - not out. Next or last would be a PCM failure.
Melting Slicks
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From: Palmdale CA
Thread Starter
Pro
Joined: May 2015
Posts: 609
Likes: 22
From: Milton Florida
St. Jude Donor '16
Thanks for the help. I do have the FSM, planned on trouble shooting the problem, but thought I would reach out to the forum for some input before I started. I didn't feel that both sensors would fail at the same time. This is my first Corvette and I am still learning the car. Mileage on the car is 128000.
Cheers to all
Cheers to all
Last edited by Fastnail; Dec 18, 2015 at 07:11 PM.
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Race Director
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Thanks for the help. I do have the FSM, planned on trouble shooting the problem, but thought I would reach out to the forum for some input before I started. I didn't feel that both sensors would fail at the same time. This is my first Corvette and I am still learning the car. Mileage on the car is 128000.
Cheers to all
Cheers to all
Team Owner
Joined: Sep 2003
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This was an easy hit on GOOGLE for Bosch BUT there are OEMs that mention only checking. In this Bosch document you'll notice it mentions "CHECKING" not flat-out replacement. OP has a completely OBD2 compliant vehicle.
http://www.google.com/url?sa=t&rct=j...WQNxLq2YJuJDEQ
http://s7d9.scene7.com/is/content/GenuinePartsCompany/1704119pdf?$PDF$
Last edited by WVZR-1; Dec 18, 2015 at 09:33 PM.
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I don't believe I've ever seen where OBD2 O2 sensor replacement was recommended earlier than 100K. There may be something that you can mention that does but I do believe that most reliable service recommendations from MOST manufacturers is the 100K mark. Bosch I believe recommends such and SOME mention only "checking" at the 100K mark and mention maybe lasting the life of the vehicle.
This was an easy hit on GOOGLE for Bosch BUT there are OEMs that mention only checking. In this Bosch document you'll notice it mentions "CHECKING" not flat-out replacement.
http://s7d9.scene7.com/is/content/GenuinePartsCompany/1704119pdf?$PDF$
This was an easy hit on GOOGLE for Bosch BUT there are OEMs that mention only checking. In this Bosch document you'll notice it mentions "CHECKING" not flat-out replacement.
http://s7d9.scene7.com/is/content/GenuinePartsCompany/1704119pdf?$PDF$
it is normal mantiance if you don't want to do it, it's your car.
I would blow cigar smoke in your brake booster vacumme hose and see where it comes out the engine for vacumme leaks.
Last edited by antfarmer2; Dec 18, 2015 at 10:01 PM.
Drifting
Joined: Mar 2012
Posts: 1,492
Likes: 61
From: New Jersey
If the O2 sensors are original, then at 20 years old and 128k, I would preliminarily at least change them as the recommended interval is 100k and they are overdue.
Here's an interesting read on O2 sensors -
http://www.obdii.com/articles/Replac...intenance.html
After replacement erase the codes and check to see what happens.
Here's an interesting read on O2 sensors -
http://www.obdii.com/articles/Replac...intenance.html
After replacement erase the codes and check to see what happens.
Team Owner
Joined: Sep 2003
Posts: 25,366
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I don't know that there's any reason to replace just because it's suggested. I might consider replacement of the O2's pre-cat but since the early OBD2 doesn't use post-cat O2's to control I might just "observe" them. For this discussion of this vehicle I would NOT consider any replacement yet.
The OP in this case I believe needs to look into the "runs rough" as mentioned way back by "desertmike1". That done first, the argument for a just because replacement can be continued another day.
Does the car need to be checked using a "professional scanning device" for diagnostics? Very likely I'd think. "Cardo0" it seems agrees.
I believe that before someone just suggests replacement of anything because it's suggested they need to understand what it is that's being discussed.
The OP in this case I believe needs to look into the "runs rough" as mentioned way back by "desertmike1". That done first, the argument for a just because replacement can be continued another day.
Does the car need to be checked using a "professional scanning device" for diagnostics? Very likely I'd think. "Cardo0" it seems agrees.
I believe that before someone just suggests replacement of anything because it's suggested they need to understand what it is that's being discussed.
Last edited by WVZR-1; Dec 19, 2015 at 05:29 AM.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Thanks for the help. I do have the FSM, planned on trouble shooting the problem, but thought I would reach out to the forum for some input before I started. I didn't feel that both sensors would fail at the same time. This is my first Corvette and I am still learning the car. Mileage on the car is 128000.
Cheers to all
Cheers to all
Well if u dont bother to even look at the trouble shooting charts in the FSM your just going to get best guesses over the faceless internet. If u had some specific questions u are confused about then lets hear them. But it reads like u want to read regurgitated guesses of your code problems from those with less information than u have. For a response to your problem then i can say either replace the engine and O2 sensors or take it to the dealer and have them fix it. That should be a lasting fix.
Good bye.
Drifting
Joined: Mar 2012
Posts: 1,492
Likes: 61
From: New Jersey
I don't know that there's any reason to replace just because it's suggested. I might consider replacement of the O2's pre-cat but since the early OBD2 doesn't use post-cat O2's to control I might just "observe" them. For this discussion of this vehicle I would NOT consider any replacement yet.
The OP in this case I believe needs to look into the "runs rough" as mentioned way back by "desertmike1". That done first, the argument for a just because replacement can be continued another day.
Does the car need to be checked using a "professional scanning device" for diagnostics? Very likely I'd think. "Cardo0" it seems agrees.
I believe that before someone just suggests replacement of anything because it's suggested they need to understand what it is that's being discussed.
The OP in this case I believe needs to look into the "runs rough" as mentioned way back by "desertmike1". That done first, the argument for a just because replacement can be continued another day.
Does the car need to be checked using a "professional scanning device" for diagnostics? Very likely I'd think. "Cardo0" it seems agrees.
I believe that before someone just suggests replacement of anything because it's suggested they need to understand what it is that's being discussed.
Last edited by Silver96ce; Dec 19, 2015 at 02:47 PM.
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don't let them get you down.
that is what the forum is for. going to the dealer or a ( pro ) most times just lightens your wallet. if you are tight on money do the fronts first but best to do all at once. reading some posts I wonder how they decide what spark plugs to replace.
that is what the forum is for. going to the dealer or a ( pro ) most times just lightens your wallet. if you are tight on money do the fronts first but best to do all at once. reading some posts I wonder how they decide what spark plugs to replace.
Race Director
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