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3rd Oxygen Sensor fails after 10k
So I have replaced the left side/driver side O2 sensor 3 times in 10K miles. Each time it lasts for several months to a year ( don't drive it that much ) then the CEL light will come on and I pull a #37. I am wondering if something is causing it to fail i.e. a fault Cat maybe? Any way to test the sensor?
Thanks, Dust |
#2
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Re: 3rd Oxygen Sensor fails after 10k
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Keith |
#3
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Re: 3rd Oxygen Sensor fails after 10k
Consider the following possibilities:
Check for exhaust leaks Check for wiring problems (shorted, frayed wires) Check for inlet air leaks Check the MAF sensor for proper operation What brand are you using for the replacement?
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#4
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Re: 3rd Oxygen Sensor fails after 10k
Our O2 sensors are before the cats, so they don't really factor in. It could be that the O2 sensor on that side is getting fouled up somehow. Maybe running too rich or burning oil?
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'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#5
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Re: 3rd Oxygen Sensor fails after 10k
Hmm? well I have the usual leaks, the connection is fairly covered in oil, short of that the car is running fine. No notice of burning oil?
The first two were Bosch then I read on here that many were having problems with them so this last time I ordered an off brand. Thanks for the ideas guys, I'll have to take a closer look around tomorrow. Dust |
#6
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Re: 3rd Oxygen Sensor fails after 10k
Well I think I fixed it. I wanted to finish this thread so that it will be here for those with similar problems. I search quite a bit here and find it helpful to read about a resolution.
Upon closer inspection I found a broken vacuum hose on the passenger side going into the intake manifold. Right in front of me. Anyway I cut it down and tied it on with a zip tie and walla, runs great and no check engine light. So now I am going to go buy some new hose and do it right. I’m trying to talk myself into pulling the intake manifold and doing them all but I'd be lying if I said just reading about it scares me. Dust |
#7
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Re: 3rd Oxygen Sensor fails after 10k
Quote:
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Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#8
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Re: 3rd Oxygen Sensor fails after 10k
That's the one. It was so brittle that I couldn'nt even bend it. Love the cheap fixes.
Dust |
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