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Registered
Join Date: Feb 2003
Location: TX
Posts: 112
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Oxygen Sensor light on??
On the way to drop off the SC for some much needed A/C work, the oxygen sensor light came on. I checked the manual, which states that the sensor light functions as sort of a maintenance reminder, however, my mech thinks the sensor maybe blown or that the connecting wire was ripped out somehow. I'm suppose to hear from him sometime today. By the way, the previous owner just replaced the sensor last year. What do ya think?
Is it easy to install a new sensor, I'm already expecting a nice bill for the A/C, really don't want to hand over another arm or leg for installing a sensor. Thanks. 
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05-20-2003, 05:46 AM
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Registered
Join Date: Jul 2002
Location: Provo, Utah
Posts: 127
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Mine came on about 3 months ago, the week before I had to have an emission check done. I panicked but then checked this board and saw that it was more than likely just a reset. I did the reset, per the manual, and sailed through emissions. They may not have reset it when they swapped the sensor. I think it runs on 30k cycles but not positive. Good luck.
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05-20-2003, 06:08 AM
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Registered
Join Date: Feb 2003
Location: TX
Posts: 112
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Newbie mistake, I posted before I did a search on the board. What do ya know, I found a thread telling exactly how to reset the sensor. However, I am still interested in knowing how to replace it if need be. From the threads I read, it didn't sound too hard.
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05-20-2003, 06:13 AM
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Join Date: Feb 2003
Location: Aurora, CO
Posts: 822
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It's as simple as replacing a spark plug; I did it a couple of months ago. Just be sure to soak it with liquid wrench the day before you want to take it off.
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Matt '82 911SC Targa! |
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05-20-2003, 06:46 AM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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Changing a spark plug is substantially more complicated than changing the O2 sensor. At least you can SEE the O2 sensor.
If it was replaced recently, then it does not need replacing now. Be very skeptical if they try to sell you an O2 sensor. If the car passes emissions, then reset the O2 light and drive. IN fact, I believe the mileage counter (the thing behind the speedo that has the reset button) is grounded by a brown wire than runs to the tach. At least that is my faint recollection. Unplug this ground wire, tape it up (for safety) and you'll never have to reset the O2 light again. It comes on every 30k miles. The O2 light circuit has no way of knowing whether your O2 sensor is working or not. It just comes on every 30k miles. There is no correlation between the light and the sensor itself. None.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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05-20-2003, 07:48 AM
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Registered
Join Date: Feb 2003
Location: TX
Posts: 112
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Thanks for the help. Hopefully I will be able to return the favor someday.
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05-20-2003, 01:48 PM
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