replace them or leave them?
replace them or leave them? Hello guys, so its been like 6 months since i did my LTs and exhaust and my SES was throwing heater problem and PO135 and insufficient bla bla for the front O2's (both of them). ive been told it is common after LTs install. i do not have my rears anymore i lost them somewhere... car drives fine. no misfires no anything. my question is am i losing power?? i will be dynoing my car soon and i can get gm stock o2 for cheap should i go on and replace them with stockers? i know bosch and denso are great but what about acdelco? or should i just leave them alone? any advices are welcomed. thanks.
TECH Apprentice
Joined: Oct 2008
Posts: 330
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From: Wheaton, Illinois
Hello guys, so its been like 6 months since i did my LTs and exhaust and my SES was throwing heater problem and PO135 and insufficient bla bla for the front O2's (both of them). ive been told it is common after LTs install. i do not have my rears anymore i lost them somewhere... car drives fine. no misfires no anything. my question is am i losing power?? i will be dynoing my car soon and i can get gm stock o2 for cheap should i go on and replace them with stockers? i know bosch and denso are great but what about acdelco? or should i just leave them alone? any advices are welcomed. thanks.
i was told the stock O2's or the OEM replacements were bosch and i was in the same boat and it cost me 300 buck in O2's extensions and the shop time to install them i would just leave it as it is, after i threw 300 bucks at my SES code problem and it still throws a code every once and a while but them goes off.
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Joined: Oct 2008
Posts: 330
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From: Wheaton, Illinois
i was told the stock O2's or the OEM replacements were bosch and i was in the same boat and it cost me 300 buck in O2's extensions and the shop time to install them i would just leave it as it is, after i threw 300 bucks at my SES code problem and it still throws a code every once and a while but them goes off.
Those are o2 heater malfunction codes and I got them after I installed lts. I noticed the cars idle was a little off. It turned out to be the o2s going bad.
I have the bosch 13111s for the vettes in there now and I dont get those codes anymore. But I still do get the common slow switching codes which dosent effect anything.
I have the bosch 13111s for the vettes in there now and I dont get those codes anymore. But I still do get the common slow switching codes which dosent effect anything.
Those are o2 heater malfunction codes and I got them after I installed lts. I noticed the cars idle was a little off. It turned out to be the o2s going bad.
I have the bosch 13111s for the vettes in there now and I dont get those codes anymore. But I still do get the common slow switching codes which dosent effect anything.
I have the bosch 13111s for the vettes in there now and I dont get those codes anymore. But I still do get the common slow switching codes which dosent effect anything.
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i didnt i paid $75 a piece for the O2's $30 for the extensions and then the shop to remove and install the new one and delete the codes and the rear O2's was $80
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Verdad Gallardo damn i was afraid to get these replies. i think am leaving them 
seems like comon O2 crap....ws6fitz and senicalj4579 are you guys still getting codes? and am i losting any hp\tq?? thanks.
seems like comon O2 crap....ws6fitz and senicalj4579 are you guys still getting codes? and am i losting any hp\tq?? thanks. No you shouldnt keep them in. IDK how your car isnt running like **** or a little off at this point. The first code you mentioned is not something you just leave so replace those. The slow switching codes are the ones thats common and ok.
TECH Apprentice
Joined: Oct 2008
Posts: 330
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From: Wheaton, Illinois
Yes still getting the codes. The SES light comes on for a couple days then goes off for a couple days. Replaced the 02's and continued to do the same thing.
TECH Apprentice
Joined: Oct 2008
Posts: 330
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From: Wheaton, Illinois
I can not feel a difference in performance. I have had the SES light on and off in the same day at the track and the car has performed exactly the same way. The only thing that will affect you is MPG when cruising around. When the SES light is on your fuel trims will not be used, so you will see worse MPG. Under wide open throttle the fuel trims are not used so you will not have any problems there. Hope that helps a bit.
