Dear friends, I got the "CHECK ENGINE" light on for my 99 Camry, the diagnosis was "the AIR FUEL SENSOR failed". I was quoted for $444 to replace this thing from my dealer. Seems to me this price is very very high. Does any know any better deal for replace this sensor? What could happen to my car if I don't replace it right away? Thanks.
--steve
My understanding of the engine management computer response ie:
If the sensor fails to supply up-dates on mixture, something the engine management computer determines by intentionally shifting the mixture a small amount around stoichmetric (sp)which is the ideal mixture ratio for IC engines, the computer then switches to 'open loop' mixture control which relies on vacuum. throttle position, engine advance etc.
The engine in this mode should not return bad economy,..just a little down on normal. Also this 'open loop condition is used when the engine is cold as the O2sensor (air-fuel) doesnt work until its up to temp.
This site expains how they work. A number of companies make them, and should be able to supply a cheaper replacement if you do a Google or Yellow pages search for your area.
Jason
It's just a heated o2 sensor. You can buy it from toyota, maybe 250 to 300 bucks, or get a bosch or other generic for around 100. It screws in like a spark plug, sticking right at ya when you look under the hood. Next time, I'm going with bosch, heh..
mb
0-------------------steve wrote:
Mine failed last year and I had to replace the oxygen sensor ( air fuel sensor),EGR and VSV also. I shelled out over $700 to the blood sucking dealer.
Try Lincoln Frash at Butler Toyota
800-692-6396 fax 317-848-6642I have no affiliation with them other than being pleased with their pricing and service. This way you get the genuine Toyota part at a reasonable price, and can have any qualified local mechanic install it for you. Chances are, the heating element burned out. The oxygen sensor itself can last a long time unless contaminated by an overly rich mixture or acetic acid from silicone sealer.
Hi! I own a Carina (European version of early Corolla, same engine) and have the same problem with my o2 sensor. Could it be that the engine light has come on because the battery was disconnected, and the power supply to the sensor was interrupted? I've read that that can sometimes be the only problem. If I got the dash board light reset, would a real fault make it come back on again, but if it was working OK it would stay off?
Would be REALLY grateful for any snippets of advice.
Thanks in advance! Gaz
same problem with my o2 sensor. Could it be that the engine light has come on because the battery was disconnected, and the power supply to the sensor was interrupted?
NO
If I got the dash board light reset, would a real fault make it come back on again,
YES
but if it was working OK it would stay off?
YES
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