Check engine soon light on
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Intermediate
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Check engine soon light on
I had a 3 inch B & B tri flow exhaust and changed them to muffler eliminators with an x-pipe. I love them with the new louder sound but the check engine soon light came on after changing to eliminators. I checked the owners manual and talks about emissions. I m thinking this is not a big deal or should I have it checked out? The light does bother me a little though, just dont want to spend more money because of the wife you know what I mean?
Race Director
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You've probably increased the flow through the exhaust to the point that the O2 sensors are not heating up within the allowable time period. You may have to: (1) relocate the O2 sensors upstream to a hotter location, (2) Eliminate the sensors thru a tune, or, (3) install O2 sensor reproducers, and trick the computer into thinking all is well with the exhaust. But, a code reader will tell the real reason, for sure. Good luck.
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What will happen if i leave it alone?
Thanks for your repys. Its a 96 LT4. I m going to eventually get it fixed but what will happen if I just leave it for now? If I should get it fixed asap, then I will.
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From: Rolla Missouri
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I will find the code.
Ok, thanks... I will find out what code it is. I will go back to the muffler shop and he should be able to give me what code it is. The car runs great and has more power than before.
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Burning Brakes
Joined: Dec 2006
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From: Tyrone PA
You've probably increased the flow through the exhaust to the point that the O2 sensors are not heating up within the allowable time period. You may have to: (1) relocate the O2 sensors upstream to a hotter location, (2) Eliminate the sensors thru a tune, or, (3) install O2 sensor reproducers, and trick the computer into thinking all is well with the exhaust. But, a code reader will tell the real reason, for sure. Good luck.
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From: The Top of Utah
Originally Posted by andrew.huh
Ok, thanks... I will find out what code it is. I will go back to the muffler shop and he should be able to give me what code it is. The car runs great and has more power than before.
RACE ON!!!
Burning Brakes
Joined: Dec 2006
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From: Tyrone PA
I would get it fixed asap. I know certain vehicles exhaust mods can make them run lean (LT headers on a 2005 Hemi truck with a superchip, don't ask me how I know) I'm not saying that is your problem, your computer codes will point you towards what is wrong. I see CFI is on the case, once you get your codes post them, there is none better than he at figuring out these C4 glitches.
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Got the code.
I went to the muffler shop where they install the muffler eliminators, and found out the code of 02 sensor heater circuit malfunction, bank 2 sensor 2. I dont know what that is but the owner of the shop who's been in business for over 20 yrs, says its nothing to worry about and i just need to get a new sensor when it comes time to smog the car again. Would anyone know if this is correct? The owner of the shop seems to know what he is talking about and is a very good person. Thanks again.
Burning Brakes
Joined: Dec 2006
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From: Tyrone PA
I went to the muffler shop where they install the muffler eliminators, and found out the code of 02 sensor heater circuit malfunction, bank 2 sensor 2. I dont know what that is but the owner of the shop who's been in business for over 20 yrs, says its nothing to worry about and i just need to get a new sensor when it comes time to smog the car again. Would anyone know if this is correct? The owner of the shop seems to know what he is talking about and is a very good person. Thanks again.
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From: The Top of Utah
Originally Posted by andrew.huh
I went to the muffler shop where they install the muffler eliminators, and found out the code of 02 sensor heater circuit malfunction, bank 2 sensor 2. I dont know what that is but the owner of the shop who's been in business for over 20 yrs, says its nothing to worry about and i just need to get a new sensor when it comes time to smog the car again. Would anyone know if this is correct?
RACE ON!!!
Safety Car
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From: Hinckley Ohio
Frankly I think the O2 sensor in question should be changed immediately at NO CHARGE TO YOU.....
Seems pretty obvious to me that the muffler shop somehow messed up the sensor when he installed your eliminators and X-pipe....pretty self serving for him to say live with it!!!
BTW I run "eliminators" on my modded 3" B&B.....no way should this effect the O2 sensor heater circuitry
Seems pretty obvious to me that the muffler shop somehow messed up the sensor when he installed your eliminators and X-pipe....pretty self serving for him to say live with it!!!
BTW I run "eliminators" on my modded 3" B&B.....no way should this effect the O2 sensor heater circuitry
Burning Brakes
Joined: Dec 2006
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From: Tyrone PA
If that is really what the code is for, he is correct. Any code should be checked out immediately, because letting it go can increase the damage and the cost of the repair. The problem with waiting to fix THIS code, isn't that it will cause any more damage, because, as you were told, it won't, but if any new codes pop up, you won't know it. If something goes wrong that should be attended to immediately, you won't know because your check engine soon light is already on.
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RACE ON!!!
Is it that a car with more than 1 oxygen sensor will just ignore the bad or misreading one and throw a code? If the car had only one 02 sensor and it was bad or not being read would the computer then go into a "limp home mode" of sorts? I know different vehicles act differently but I'm asking about an older L98 with 1 sensor in comparison to the newer LT engines with more than 1 sensor.
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From: The Top of Utah
Originally Posted by dan0617
Hey CFI....question....I don't have a problem but I like to learn when I can....
Is it that a car with more than 1 oxygen sensor will just ignore the bad or misreading one and throw a code? If the car had only one 02 sensor and it was bad or not being read would the computer then go into a "limp home mode" of sorts? I know different vehicles act differently but I'm asking about an older L98 with 1 sensor in comparison to the newer LT engines with more than 1 sensor.
Is it that a car with more than 1 oxygen sensor will just ignore the bad or misreading one and throw a code? If the car had only one 02 sensor and it was bad or not being read would the computer then go into a "limp home mode" of sorts? I know different vehicles act differently but I'm asking about an older L98 with 1 sensor in comparison to the newer LT engines with more than 1 sensor.
RACE ON!!!
Thread Starter
Intermediate
Joined: Nov 2007
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Would anyone know the Part number or reference number to this sensor?
Frankly I think the O2 sensor in question should be changed immediately at NO CHARGE TO YOU.....
Seems pretty obvious to me that the muffler shop somehow messed up the sensor when he installed your eliminators and X-pipe....pretty self serving for him to say live with it!!!
BTW I run "eliminators" on my modded 3" B&B.....no way should this effect the O2 sensor heater circuitry
Seems pretty obvious to me that the muffler shop somehow messed up the sensor when he installed your eliminators and X-pipe....pretty self serving for him to say live with it!!!
BTW I run "eliminators" on my modded 3" B&B.....no way should this effect the O2 sensor heater circuitry