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07-23-2002, 09:48 PM
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#1
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GP Moderator
Join Date: Nov 1999
Location: Columbus, Ohio
Posts: 6,809
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Left O2 Sensor stuck at 1097mv, even after replacing it
Well, my car has been running like total crap the past few times I have drove it. I hooked up the laptop, and the left O2 sensor is stuck at 1097mv. Doesn't matter whether I just started the car, Open Loop, Closed Loop...its just stuck there.
I replaced the O2 sensor thinking it was faulty. Well, that didn't fix anything.  Any ideas as to what is causing this, and how I can fix it. The right O2 sensor is functioning normally.
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94 Firebird Formula Ram-Air, M6, T-tops, N2O, 12-Bolt, Bolt-Ons; was running 11's internally stock. 432.8 RWHP / 588.4 RWTQ
No new times or dyno numbers with new top end (CC306, 1.6RR's, ported heads, etc.)
__________________
94 Formula - Ram-Air, M6, T-tops 11.292 @ 121.52, 1.61 60' on old stock shortblock setup.
02 Avalanche - Limited North Face Edition, minor mods
04 Yamaha Raptor 660R - not stock
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07-24-2002, 12:29 AM
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#2
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Registered User
Join Date: Jul 2001
Location: so close I can taste it...
Posts: 1,175
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Is the wiring to it ok?
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F-bodyless
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07-24-2002, 12:54 AM
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#3
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Registered User
Join Date: Nov 2001
Location: Kansas
Posts: 5,307
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i guessing that is the top value for O2 readings..same thing happens when you unplug a MAF, it goes to the highest value of 461 or somewhere around there. maybe your O2 isnt plug in completely but you should be getting SES. also something to add to the confusion..i had one of mine unplugged for a day and was watching it on my scanmaster and noticed the 02 mV actually moved around some even when it wasnt there  ..got SES too 
check wiring?
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Brad
1997 Z28 M6
T-tops, chrome rims, all options, SLP Dual/Dual, cutout, !CAGS, FIPK, LT4 KM, Air Foil, TB bypass, pro 5.0, OBD1, !EGR, !AIR, CSI waterpump, 160* thermostat, 1LE intake elbow, PCM tuning by, www.PCMFORLESS.com , taylors, singe-cat SLP shorties minus the cat!
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Brad
1997 Z28 M6
340rwhp/340rwtq(before LE heads)
mods: loud exhaust and lopey idle
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07-24-2002, 02:45 AM
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#4
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GP Moderator
Join Date: Nov 1999
Location: Columbus, Ohio
Posts: 6,809
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Well, it is for sure plugged in, and plugged in all the way. No SES light for it either. Tomorrow I'm going to trace the wiring and see if it is shorting out anywhere.
Any other ideas?
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94 Firebird Formula Ram-Air, M6, T-tops, N2O, 12-Bolt, Bolt-Ons; was running 11's internally stock. 432.8 RWHP / 588.4 RWTQ
No new times or dyno numbers with new top end (CC306, 1.6RR's, ported heads, etc.)
__________________
94 Formula - Ram-Air, M6, T-tops 11.292 @ 121.52, 1.61 60' on old stock shortblock setup.
02 Avalanche - Limited North Face Edition, minor mods
04 Yamaha Raptor 660R - not stock
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07-27-2002, 02:22 PM
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#5
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Registered User
Join Date: Jun 2002
Location: TN
Posts: 418
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if you have access to an o2 simulator maybe you could check to see if it read correctly. Eastwood has a circuit tracer that seems like it would make finding wiring problems easy. Pretty cheap too but I havent used one personally.
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07-29-2002, 10:50 PM
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#6
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Junior Member
Join Date: May 2002
Location: Howell, NJ
Posts: 23
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Im having a simliar problem. When I did my headers I had the left o2 unpluged for a day or two. When I got it to plug back in the car started to smoke like it was running rich. No ses light. Im gonna double check the connections. - mike
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Red 95 Z28 M6
CIA, TB Bypass, P&P MAF, Air Foil, 160 Thermo, Taylor 8.5's, Plugs, No Cat, 4" Mufflex
1/4 - 13.8 at 103mph
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