Replace oxygen sensor even if check engine light does not come on
in [Toyota]
|
Prev: Who was it who mentioned Fram oil filters and dropping oil pressure?
Next: Bugatti 16 C Galibier Perhaps the world's most luxurious sedan
From: Mike Hunter on 23 Nov 2009 20:06 If the 02 sensor is no functioning, or it is operating outside of it design parameters, it is designed to illuminate the check engine light to denote the vehicle could be polluting, but he did not say if it was on or not on in any event "Jeff Strickland" <crwlrjeff(a)yahoo.com> wrote in message news:heetmf$3n4$1(a)news.eternal-september.org... > > "Mike Hunter" <Mikehunt2(a)lycos,com> wrote in message > news:4b0ae82b$0$22066$ce5e7886(a)news-radius.ptd.net... >> What you SHOULD do is take the car to a competent tech, who has the >> proper equipment to analyze WHY the check engine light is illuminated and >> have the fault corrected, or you can continue to change some very >> expensive parts, like the O2 Sensor, until you hit upon the correct part >> that is causing the check engine light to illuminate. >> >> The O2 Sensor rarely fails, but it does become contaminated, because of >> what could be a minor fault in the closed loop system > > > Mike, > The Check light is not on. The OP has reported poor fuel mileage, and > wants advice on replacing the O2 Sensor to fix the problem. > > > >
From: Ray O on 23 Nov 2009 23:25 "Mike Hunter" <Mikehunt2(a)lycos,com> wrote in message news:4b0b3044$0$22028$ce5e7886(a)news-radius.ptd.net... > He did not say if it was on not. > the title of the post implied that the check engine light was not on, but your advice was right on anyway ;-) -- Ray O (correct punctuation to reply)
From: Ray O on 24 Nov 2009 12:24
"Fatter Than Ever Moe" <HardTimes(a)TheFarm> wrote in message news:4b0b911b$0$5356$bbae4d71(a)news.suddenlink.net... > Ray O wrote: >> "msrdude" <kimiga(a)gmail.com> wrote in message >> news:1a09a78d-5841-4338-be7c-5c15429c0275(a)k13g2000prh.googlegroups.com... >>> Well I am kind of getting bad fuel economy on my car. I replaced the >>> air filter, spark plug, spark plug wires, poured in fuel injector and >>> fuel system cleaner into my gas tank after fill up. It sill made no >>> difference. So I suspect the o2 sensor is kind of bad causing the fuel >>> economy to be kind of bad. Well I never replaced the o2 sensor before >>> and its 125 k miles on it. Well I should replace it anyways because it >>> is almost due anyways. >>> Should I buy the NTK o2 sensors or should I go with OEM Toyota? >> >> What brand spark plug and spark plug wires did you use? >> >> When you say that the fuel economy is kind of bad, how bad is it? >> >> Toyota does not publish a replacement interval for O2 sensors because >> they normally do not need to be replaced unless they are bad. I would be >> surprised if a bad O2 sensor made more than a 1 MPG difference, if that. >> >> There are many other things that can cause poor fuel economy that I would >> check before replacing the O2 sensor. >> >> Check tire inflation. They should be filled to at least the pressure >> specified in your owner's manual, preferably 5 or 6 PSI higher to improve >> fuel economy and tire life. >> >> Multiple short trips will result in poor fuel economy because the engine >> gets poorer fuel economy while it is warming up. >> >> Does the coolant temperature gauge rise to the halfway point when the >> engine is warmed up? >> >> Excess weight in the car will reduce fuel economy so empty unnecessary >> cargo. >> >> Jackrabbit starts, unsteady throttle, etc. will reduce fuel economy. >> >> What is the condition of the transmission and automatic transmission >> fluid? >> >> If you decide to replace the O2 sensors use OEM. > > add ethanolized gasoline to the list, Ethanol has been added to gasoline for a pretty long time, so while it reduces fuel economy, I doubt if that is the cause of the OP's concern. -- Ray O (correct punctuation to reply) |