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PostPosted: Wed Dec 13, 2017 10:40 pm 
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LE Member

Joined: Mon Apr 17, 2017 2:32 am
Posts: 7
Year and Trim: 2000 Buick LeSabre
Quote:
What are the symptoms of a bad oxygen sensor?
Symptoms of a Bad Oxygen Sensor:
When you have a bad oxygen sensor, your vehicle will run less efficiently, it can sometimes have a poor idle, erratic jerking at steady throttle, hard starting problems, cause the check engine light to come on, and will cause high fuel consumption.


Quote:
How do you know if your oxygen sensor is bad?
Check this list to see if it's time to replace YOUR vehicle's oxygen sensors:
Sudden decrease in fuel mileage....
Flashing check engine light or malfunction indicator lamp in the vehicle?s dash board....
Failure to pass smog....
Overall poor vehicle performance; rough idling, stalling, hesitation on acceleration, etc.


When do you guys change your upstream oxygen sensor ? Do you wait until there's a DTC ?


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PostPosted: Wed Dec 13, 2017 11:22 pm 
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Joined: Sat Oct 28, 2017 10:00 pm
Posts: 39
Year and Trim: 2003 Pontiac Bonneville SSEI
standard recommendation is 100,000mi I personally wouldn't push it past 75,000mi....it and the MAF sensor have some of the biggest affects on your fuel mileage.

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PostPosted: Thu Dec 14, 2017 12:29 pm 
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Certified Bonneville Nut
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Joined: Mon May 10, 2010 6:11 pm
Posts: 8773
Location: Chicago, IL
Year and Trim: 2003 SLE
166k miles on the original O2 and everything appears to be fine. But I guess it might be time for a change soon.

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PostPosted: Thu Dec 14, 2017 4:38 pm 
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Certified Bonneville Nut
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Joined: Wed May 13, 2009 10:45 pm
Posts: 5351
Location: CHICAGO
Year and Trim: 2006 Cadillac STS-V, 2004 Pontiac GTO
Change it/them when it/they becomes a problem. Actually first, I would try cleaning them and see if that buys you some additional time.

There is no need to change them at 75k or 100k or whatever. I think that's my lulz for the day.

Never had service bulletins that told us to change HO2S's because "when they reach a pre-determined mileage..."

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Retired Bonneville Owner and former GM Tech:
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Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
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2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

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PostPosted: Thu Dec 14, 2017 5:12 pm 
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Posts like an L67
Posts like an L67

Joined: Sun Aug 22, 2010 11:11 pm
Posts: 1380
Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
yes, dont throw parts at your ride just cause - if you have 100 buck scanner, you can see their voltages and then determine if they are working within the expected range and not slow or stuck - not very expensive but clean all 3 first - o2 x 2 and maf.

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past rides:
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PostPosted: Fri Dec 15, 2017 3:59 pm 
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Joined: Mon May 19, 2008 5:06 pm
Posts: 12214
Location: Powell River BC - 7 time WCBF Survivor
Year and Trim: 2000 SSEi, 79 Firebird, 88 Jeep, 11 Yukon Denali
poverty forces one to do unorthodox things
:banana:

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2000 SSEi - SilverBullet - 73,000 kms, 4" "straight shot" custom headlight ram air inlet, TOGs, 1.9's, Lsd, 2.9-3.4"MPS 10-15 psi, Ported GenV, EGR eliminated, OR pushrods, oil volume kit, trani cooler & shift kit, Titanium retainers, 90 lb springs, 160 Stat, 42# injectors, Fuel pump voltage increase, Wideband O2, 3" to dual 2 1/2" Magnaflows, Snow Meth/water injection, after SC temp gauge, 255/50WR17, timing commander set 15-18*@WOT, 2 speed Fan over-ride, disabled DRL, Solid motor mount, Meziere Electric water pump, adjustable fuel pressure regulator, Drilled & slotted rotors/ceramics, GXP sway bars and STB, Upgraded and rebuilt transmission, Pioneer Bluetooth stereo with sub and 800 W amps, PB 13.5 quarter, (April 2014 car of the month)


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