Re: O2 sensor controversy again
Michael Pardee wrote:
> I would have thought OBDII would catch O2 weakness, too, but as the Subaru > experience illustrates it isn't necessarily so. I am puzzled what sort of > out-of-the-box defect the sensor would have that would cause it to behave so > badly and not be tattled on, though. > > Mike =============================== :-) Maybe the out-of-the-box defect was caused by the BOX ITSELF (like it had the word BOSCH on it)? I keep hearing horror stories about BOSCH, and having owned Volvo and VW, I believe it. :-( 'Curly' |
Re: O2 sensor controversy again
"'Curly Q. Links'" <motsco__@interbaun.com> wrote in
news:444CE564.A6DB1014@interbaun.com: > Michael Pardee wrote: >> >> "Woody" <TheDuck@pond.net> wrote in message >> news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >> > Am 89 is not OBDII compliant and does not monitor the sensors that >> > close and the sensors are totally different. The OBDII system >> > monitors heater current and voltage and switching times and voltage >> > to very precisely determine what they are doing. The chance of them >> > causing a problem without setting a code is extremely slim. They >> > can be setting sub codes long before turning on the light on the >> > dash. The information in the computer should be thoroughly analyzed >> > as swapping parts is expensive and could just be masking the real >> > problem. >> > >> > >> I would have thought OBDII would catch O2 weakness, too, but as the >> Subaru experience illustrates it isn't necessarily so. I am puzzled >> what sort of out-of-the-box defect the sensor would have that would >> cause it to behave so badly and not be tattled on, though. >> >> Mike > > -------------------------------------- > > Maybe the out-of-the-box defect was caused by the BOX ITSELF (like it > had the word BOSCH on it)? I keep hearing horror stories about BOSCH, > and having owned Volvo and VW, I believe it. > > :-( > > 'Curly' Bosch,the new Prince of Darkness? (Lucas being the old one) -- Jim Yanik jyanik at kua.net |
Re: O2 sensor controversy again
"'Curly Q. Links'" <motsco__@interbaun.com> wrote in
news:444CE564.A6DB1014@interbaun.com: > Michael Pardee wrote: >> >> "Woody" <TheDuck@pond.net> wrote in message >> news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >> > Am 89 is not OBDII compliant and does not monitor the sensors that >> > close and the sensors are totally different. The OBDII system >> > monitors heater current and voltage and switching times and voltage >> > to very precisely determine what they are doing. The chance of them >> > causing a problem without setting a code is extremely slim. They >> > can be setting sub codes long before turning on the light on the >> > dash. The information in the computer should be thoroughly analyzed >> > as swapping parts is expensive and could just be masking the real >> > problem. >> > >> > >> I would have thought OBDII would catch O2 weakness, too, but as the >> Subaru experience illustrates it isn't necessarily so. I am puzzled >> what sort of out-of-the-box defect the sensor would have that would >> cause it to behave so badly and not be tattled on, though. >> >> Mike > > -------------------------------------- > > Maybe the out-of-the-box defect was caused by the BOX ITSELF (like it > had the word BOSCH on it)? I keep hearing horror stories about BOSCH, > and having owned Volvo and VW, I believe it. > > :-( > > 'Curly' Bosch,the new Prince of Darkness? (Lucas being the old one) -- Jim Yanik jyanik at kua.net |
Re: O2 sensor controversy again
"'Curly Q. Links'" <motsco__@interbaun.com> wrote in
news:444CE564.A6DB1014@interbaun.com: > Michael Pardee wrote: >> >> "Woody" <TheDuck@pond.net> wrote in message >> news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >> > Am 89 is not OBDII compliant and does not monitor the sensors that >> > close and the sensors are totally different. The OBDII system >> > monitors heater current and voltage and switching times and voltage >> > to very precisely determine what they are doing. The chance of them >> > causing a problem without setting a code is extremely slim. They >> > can be setting sub codes long before turning on the light on the >> > dash. The information in the computer should be thoroughly analyzed >> > as swapping parts is expensive and could just be masking the real >> > problem. >> > >> > >> I would have thought OBDII would catch O2 weakness, too, but as the >> Subaru experience illustrates it isn't necessarily so. I am puzzled >> what sort of out-of-the-box defect the sensor would have that would >> cause it to behave so badly and not be tattled on, though. >> >> Mike > > -------------------------------------- > > Maybe the out-of-the-box defect was caused by the BOX ITSELF (like it > had the word BOSCH on it)? I keep hearing horror stories about BOSCH, > and having owned Volvo and VW, I believe it. > > :-( > > 'Curly' Bosch,the new Prince of Darkness? (Lucas being the old one) -- Jim Yanik jyanik at kua.net |
Re: O2 sensor controversy again
I won,t believe it until I see it. Of coarse Subaru may have a defect in
their OBDII code. Bad enough to cause fuel economy problems you could definitely see on the graph of the sensor. "Michael Pardee" <michaeltnull@cybertrails.com> wrote in message news:SZWdnVRoC4JHVNHZnZ2dnUVZ_s-dnZ2d@sedona.net... > "Woody" <TheDuck@pond.net> wrote in message > news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >> Am 89 is not OBDII compliant and does not monitor the sensors that close >> and the sensors are totally different. The OBDII system monitors heater >> current and voltage and switching times and voltage to very precisely >> determine what they are doing. The chance of them causing a problem >> without setting a code is extremely slim. They can be setting sub codes >> long before turning on the light on the dash. The information in the >> computer should be thoroughly analyzed as swapping parts is expensive and >> could just be masking the real problem. >> >> > I would have thought OBDII would catch O2 weakness, too, but as the Subaru > experience illustrates it isn't necessarily so. I am puzzled what sort of > out-of-the-box defect the sensor would have that would cause it to behave > so badly and not be tattled on, though. > > Mike > |
Re: O2 sensor controversy again
I won,t believe it until I see it. Of coarse Subaru may have a defect in
their OBDII code. Bad enough to cause fuel economy problems you could definitely see on the graph of the sensor. "Michael Pardee" <michaeltnull@cybertrails.com> wrote in message news:SZWdnVRoC4JHVNHZnZ2dnUVZ_s-dnZ2d@sedona.net... > "Woody" <TheDuck@pond.net> wrote in message > news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >> Am 89 is not OBDII compliant and does not monitor the sensors that close >> and the sensors are totally different. The OBDII system monitors heater >> current and voltage and switching times and voltage to very precisely >> determine what they are doing. The chance of them causing a problem >> without setting a code is extremely slim. They can be setting sub codes >> long before turning on the light on the dash. The information in the >> computer should be thoroughly analyzed as swapping parts is expensive and >> could just be masking the real problem. >> >> > I would have thought OBDII would catch O2 weakness, too, but as the Subaru > experience illustrates it isn't necessarily so. I am puzzled what sort of > out-of-the-box defect the sensor would have that would cause it to behave > so badly and not be tattled on, though. > > Mike > |
Re: O2 sensor controversy again
I won,t believe it until I see it. Of coarse Subaru may have a defect in
their OBDII code. Bad enough to cause fuel economy problems you could definitely see on the graph of the sensor. "Michael Pardee" <michaeltnull@cybertrails.com> wrote in message news:SZWdnVRoC4JHVNHZnZ2dnUVZ_s-dnZ2d@sedona.net... > "Woody" <TheDuck@pond.net> wrote in message > news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >> Am 89 is not OBDII compliant and does not monitor the sensors that close >> and the sensors are totally different. The OBDII system monitors heater >> current and voltage and switching times and voltage to very precisely >> determine what they are doing. The chance of them causing a problem >> without setting a code is extremely slim. They can be setting sub codes >> long before turning on the light on the dash. The information in the >> computer should be thoroughly analyzed as swapping parts is expensive and >> could just be masking the real problem. >> >> > I would have thought OBDII would catch O2 weakness, too, but as the Subaru > experience illustrates it isn't necessarily so. I am puzzled what sort of > out-of-the-box defect the sensor would have that would cause it to behave > so badly and not be tattled on, though. > > Mike > |
Re: O2 sensor controversy again
Woody wrote:
> Am 89 is not OBDII compliant and does not monitor the sensors that close and > the sensors are totally different. The OBDII system monitors heater current > and voltage and switching times and voltage to very precisely determine what > they are doing. monitoring heater current allows determination of element temperature if taken to it's logical limit and simple burn-out at its most basic. other than that, unless it's truly sophisticated, which i doubt in a very noisy electrical environment like under the hood of a car, diagnostics are going to be fairly basic stuff. the primary fault detection mode afaik is to set differential limits between primary and secondary sensors, and trigger if exceeded. > The chance of them causing a problem without setting a code > is extremely slim. They can be setting sub codes long before turning on the > light on the dash. The information in the computer should be thoroughly > analyzed as swapping parts is expensive and could just be masking the real > problem. but most people take it to a shop that has testing tools. the obdc computer therefore doesn't need to be that sophisticated. for the home mechanic, and in the absence of these expensive diagnostics, a few parts scavenged from a junk yard, which is where i got the sensors for my comparisons, can be a /much/ cheaper way of determining the level of problem. > > > "jim beam" <nospam@example.net> wrote in message > news:-tSdnUzA2tZufdbZnZ2dnUVZ_tKdnZ2d@speakeasy.net... > >>Michael Pardee wrote: >> >>>The question of whether an O2 sensor can be bad enough to cause >>>drivability or fuel economy problems without triggering OBDII codes has >>>another data point. >>> >>>In the alt.autos.subaru forum somebody asked for help sorting out very >>>troublesome hesitation after slowing in a 2006 Outback. A respondent had >>>the same problem in his car, and pressured the dealer to do *something*! >>>The dealer replaced the O2 sensor (front one, I presume) in spite of lack >>>of diagnostic codes and the symptom disappeared. >>> >>>Mike >> >>my experience is yes, it can definitely scratch that itch. with cheapo >>aftermarket sensors, my '89, which has a slight tendency to hesitiation >>anyway, is /way/ worse. no codes. but when i use a new oem sensor, that >>problem all but disappears. > > > |
Re: O2 sensor controversy again
Woody wrote:
> Am 89 is not OBDII compliant and does not monitor the sensors that close and > the sensors are totally different. The OBDII system monitors heater current > and voltage and switching times and voltage to very precisely determine what > they are doing. monitoring heater current allows determination of element temperature if taken to it's logical limit and simple burn-out at its most basic. other than that, unless it's truly sophisticated, which i doubt in a very noisy electrical environment like under the hood of a car, diagnostics are going to be fairly basic stuff. the primary fault detection mode afaik is to set differential limits between primary and secondary sensors, and trigger if exceeded. > The chance of them causing a problem without setting a code > is extremely slim. They can be setting sub codes long before turning on the > light on the dash. The information in the computer should be thoroughly > analyzed as swapping parts is expensive and could just be masking the real > problem. but most people take it to a shop that has testing tools. the obdc computer therefore doesn't need to be that sophisticated. for the home mechanic, and in the absence of these expensive diagnostics, a few parts scavenged from a junk yard, which is where i got the sensors for my comparisons, can be a /much/ cheaper way of determining the level of problem. > > > "jim beam" <nospam@example.net> wrote in message > news:-tSdnUzA2tZufdbZnZ2dnUVZ_tKdnZ2d@speakeasy.net... > >>Michael Pardee wrote: >> >>>The question of whether an O2 sensor can be bad enough to cause >>>drivability or fuel economy problems without triggering OBDII codes has >>>another data point. >>> >>>In the alt.autos.subaru forum somebody asked for help sorting out very >>>troublesome hesitation after slowing in a 2006 Outback. A respondent had >>>the same problem in his car, and pressured the dealer to do *something*! >>>The dealer replaced the O2 sensor (front one, I presume) in spite of lack >>>of diagnostic codes and the symptom disappeared. >>> >>>Mike >> >>my experience is yes, it can definitely scratch that itch. with cheapo >>aftermarket sensors, my '89, which has a slight tendency to hesitiation >>anyway, is /way/ worse. no codes. but when i use a new oem sensor, that >>problem all but disappears. > > > |
Re: O2 sensor controversy again
Woody wrote:
> Am 89 is not OBDII compliant and does not monitor the sensors that close and > the sensors are totally different. The OBDII system monitors heater current > and voltage and switching times and voltage to very precisely determine what > they are doing. monitoring heater current allows determination of element temperature if taken to it's logical limit and simple burn-out at its most basic. other than that, unless it's truly sophisticated, which i doubt in a very noisy electrical environment like under the hood of a car, diagnostics are going to be fairly basic stuff. the primary fault detection mode afaik is to set differential limits between primary and secondary sensors, and trigger if exceeded. > The chance of them causing a problem without setting a code > is extremely slim. They can be setting sub codes long before turning on the > light on the dash. The information in the computer should be thoroughly > analyzed as swapping parts is expensive and could just be masking the real > problem. but most people take it to a shop that has testing tools. the obdc computer therefore doesn't need to be that sophisticated. for the home mechanic, and in the absence of these expensive diagnostics, a few parts scavenged from a junk yard, which is where i got the sensors for my comparisons, can be a /much/ cheaper way of determining the level of problem. > > > "jim beam" <nospam@example.net> wrote in message > news:-tSdnUzA2tZufdbZnZ2dnUVZ_tKdnZ2d@speakeasy.net... > >>Michael Pardee wrote: >> >>>The question of whether an O2 sensor can be bad enough to cause >>>drivability or fuel economy problems without triggering OBDII codes has >>>another data point. >>> >>>In the alt.autos.subaru forum somebody asked for help sorting out very >>>troublesome hesitation after slowing in a 2006 Outback. A respondent had >>>the same problem in his car, and pressured the dealer to do *something*! >>>The dealer replaced the O2 sensor (front one, I presume) in spite of lack >>>of diagnostic codes and the symptom disappeared. >>> >>>Mike >> >>my experience is yes, it can definitely scratch that itch. with cheapo >>aftermarket sensors, my '89, which has a slight tendency to hesitiation >>anyway, is /way/ worse. no codes. but when i use a new oem sensor, that >>problem all but disappears. > > > |
Re: O2 sensor controversy again
"Woody" <TheDuck@pond.net> wrote in
news:Wku3g.75554$dW3.59371@newssvr21.news.prodigy. com: > I won,t believe it until I see it. Of coarse Subaru may have a defect > in their OBDII code. Bad enough to cause fuel economy problems you > could definitely see on the graph of the sensor. > > > "Michael Pardee" <michaeltnull@cybertrails.com> wrote in message > news:SZWdnVRoC4JHVNHZnZ2dnUVZ_s-dnZ2d@sedona.net... >> "Woody" <TheDuck@pond.net> wrote in message >> news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >>> Am 89 is not OBDII compliant and does not monitor the sensors that >>> close and the sensors are totally different. The OBDII system >>> monitors heater current and voltage and switching times and voltage >>> to very precisely determine what they are doing. The chance of them >>> causing a problem without setting a code is extremely slim. They can >>> be setting sub codes long before turning on the light on the dash. >>> The information in the computer should be thoroughly analyzed as >>> swapping parts is expensive and could just be masking the real >>> problem. >>> >>> >> I would have thought OBDII would catch O2 weakness, too, but as the >> Subaru experience illustrates it isn't necessarily so. I am puzzled >> what sort of out-of-the-box defect the sensor would have that would >> cause it to behave so badly and not be tattled on, though. >> >> Mike >> > > > I did some Googling on "lazy oxygen sensor" and there were quite a number of articles about the O2S affecting fuel economy.(without setting a code) -- Jim Yanik jyanik at kua.net |
Re: O2 sensor controversy again
"Woody" <TheDuck@pond.net> wrote in
news:Wku3g.75554$dW3.59371@newssvr21.news.prodigy. com: > I won,t believe it until I see it. Of coarse Subaru may have a defect > in their OBDII code. Bad enough to cause fuel economy problems you > could definitely see on the graph of the sensor. > > > "Michael Pardee" <michaeltnull@cybertrails.com> wrote in message > news:SZWdnVRoC4JHVNHZnZ2dnUVZ_s-dnZ2d@sedona.net... >> "Woody" <TheDuck@pond.net> wrote in message >> news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >>> Am 89 is not OBDII compliant and does not monitor the sensors that >>> close and the sensors are totally different. The OBDII system >>> monitors heater current and voltage and switching times and voltage >>> to very precisely determine what they are doing. The chance of them >>> causing a problem without setting a code is extremely slim. They can >>> be setting sub codes long before turning on the light on the dash. >>> The information in the computer should be thoroughly analyzed as >>> swapping parts is expensive and could just be masking the real >>> problem. >>> >>> >> I would have thought OBDII would catch O2 weakness, too, but as the >> Subaru experience illustrates it isn't necessarily so. I am puzzled >> what sort of out-of-the-box defect the sensor would have that would >> cause it to behave so badly and not be tattled on, though. >> >> Mike >> > > > I did some Googling on "lazy oxygen sensor" and there were quite a number of articles about the O2S affecting fuel economy.(without setting a code) -- Jim Yanik jyanik at kua.net |
Re: O2 sensor controversy again
"Woody" <TheDuck@pond.net> wrote in
news:Wku3g.75554$dW3.59371@newssvr21.news.prodigy. com: > I won,t believe it until I see it. Of coarse Subaru may have a defect > in their OBDII code. Bad enough to cause fuel economy problems you > could definitely see on the graph of the sensor. > > > "Michael Pardee" <michaeltnull@cybertrails.com> wrote in message > news:SZWdnVRoC4JHVNHZnZ2dnUVZ_s-dnZ2d@sedona.net... >> "Woody" <TheDuck@pond.net> wrote in message >> news:8s33g.69065$H71.136@newssvr13.news.prodigy.co m... >>> Am 89 is not OBDII compliant and does not monitor the sensors that >>> close and the sensors are totally different. The OBDII system >>> monitors heater current and voltage and switching times and voltage >>> to very precisely determine what they are doing. The chance of them >>> causing a problem without setting a code is extremely slim. They can >>> be setting sub codes long before turning on the light on the dash. >>> The information in the computer should be thoroughly analyzed as >>> swapping parts is expensive and could just be masking the real >>> problem. >>> >>> >> I would have thought OBDII would catch O2 weakness, too, but as the >> Subaru experience illustrates it isn't necessarily so. I am puzzled >> what sort of out-of-the-box defect the sensor would have that would >> cause it to behave so badly and not be tattled on, though. >> >> Mike >> > > > I did some Googling on "lazy oxygen sensor" and there were quite a number of articles about the O2S affecting fuel economy.(without setting a code) -- Jim Yanik jyanik at kua.net |
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