Re: O2 Sensor Problem Again
- From: "Jeff Strickland" <crwlr@xxxxxxxxxxx>
- Date: Sat, 30 Jun 2007 00:52:30 GMT
Your trouble is NOT the output of the sensor, it's the sensor's "pre-heater".
The sensor is unstable while cold, but the engine needs to run well anyway. So, they designed in a heater circuit to heat the sensor so that it works well even before the motor comes up to temp. Without getting bogged down in really accurate detail, think of the glo-plugs in a diesel engine; they come on so one can start the motor, but when the motor begins running, the glo-plugs are turned off and the motor runs on its own. The O2 Sensor has a glo-plug (of sorts) that helps the sensor function within a narrow range much earlier than without the heater.
Your code says the heater is not working right.
I like this link for OBD II Codes
http://autorepair.about.com/od/obdcodedatabase/a/OBD_1996_year.htm
<davejohansen@xxxxxxxxx> wrote in message news:1183141786.342869.132170@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I had previously posted about the code P0141 with the O2 Sensor (the
post-converter one) in my 97 Geo Prizm. You can see the posts here:
http://groups.google.com/group/alt.autos.toyota/browse_thread/thread/27687eef2aed86b2/479834969c118a57
I ended up returning the universal part and getting the OEM one (it
was definitely worth the extra $50), but now the problem is that I
cleared the code and it came back after driving for about 20 minutes.
I checked the output voltage from the O2 Sensor and it was around
40-50 mV after the car had been running for about 10 minutes (the
manual said that it should be between 100 and 900 mV). I then tried
giving it a little gas and letting it idle just above 1500 RPMs and
the output was jumping around like crazy (the manual says that the
output should not change actively and should be fairly constant
between 100 and 900 mVs).
Does anyone have any ideas of what could be wrong? Is the catalytic
converter messed up?
Thanks,
Dave
.
- References:
- O2 Sensor Problem Again
- From: davejohansen@xxxxxxxxx
- O2 Sensor Problem Again
- Prev by Date: Re: {OT}This place needs to lighten up...
- Next by Date: Re: OT: "Lucy" Approved for Tour
- Previous by thread: Re: O2 Sensor Problem Again
- Next by thread: {OT}This place needs to lighten up...
- Index(es):
Relevant Pages
|
