Will a bad o2 always throw a code?
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Registered User
Joined: Mar 2004
Posts: 281
From: MI
Will a bad o2 always throw a code?
My car is running ruff , I have narrowed it down to the o2s because I just changed the opti and plugs/wires
I replaced the stock ones with bosch 02s about 20k miles ago.
Im not getting any codes consistantly, what I mean by that is ones in a while ill get the SES light to flicker then stay on but if I let the car sit the SES light wont come back on when i turn it on
Im looking for some place to scan my car but since its a 93 im kinda having trouble
I replaced the stock ones with bosch 02s about 20k miles ago.
Im not getting any codes consistantly, what I mean by that is ones in a while ill get the SES light to flicker then stay on but if I let the car sit the SES light wont come back on when i turn it on
Im looking for some place to scan my car but since its a 93 im kinda having trouble
Registered User
Joined: Jul 2001
Posts: 280
From: South Bay Area, CA U.S.A
Re: yes
so what does it mean when one of my 02's is stuck at 430-440. My ATap scanning shows that its not jumping around. I'm kinda a noob so pardon if I sound like a jackazz. Thanks.
Originally posted by Zeueses 97 RamAir
760 800 900mv yes they will throw codes after you erase them it takes a while for them to come on again.
760 800 900mv yes they will throw codes after you erase them it takes a while for them to come on again.
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Registered User
Joined: Nov 2002
Posts: 1,544
From: Michigan
sounds like ignition to me.......sure everything is good. You can crack plugs when putting them in.
Like stated above 02's will just drink gas, like 10mpg. But one time i took it into the GM dealorship when it was running rough and they said it was the EGR system....i was like ummmmm no it's ignition. So they garentee its the EGR next day i'm back getting free plugs and wires put in
But then again maybe the EGR could cause it......They felt dumb.......expecially after i told them what it was.
O yea the SES light would come on sometimes i believe too. Best way is to scan it
Like stated above 02's will just drink gas, like 10mpg. But one time i took it into the GM dealorship when it was running rough and they said it was the EGR system....i was like ummmmm no it's ignition. So they garentee its the EGR next day i'm back getting free plugs and wires put in
But then again maybe the EGR could cause it......They felt dumb.......expecially after i told them what it was. O yea the SES light would come on sometimes i believe too. Best way is to scan it
Thread Starter
Registered User
Joined: Mar 2004
Posts: 281
From: MI
The reason I changed the o2's is because one was ruff , it was tripped the SES light and made the car run rough, I knew a guy at a chevy dealer and he scaned it for and sure enough , one of the o2's werent dancing . I changed them both and problem fixxed.
I just swapped the opti because my car was running like this and I thought the opti was my problem, I hope i didnt get bad opti
I think i found a guy to scan it
I just swapped the opti because my car was running like this and I thought the opti was my problem, I hope i didnt get bad opti
I think i found a guy to scan it
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