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Old 05-18-2012, 09:02 PM
 
Location: Earth
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What's the difference and why would you want or need a heated O2 sensor?
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Old 05-18-2012, 10:51 PM
 
Location: Texas
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The heated units start quicker, make fuel trim adjustments quicker and sooner than a non heated unit. Helps keep the CATs cleaner and yields a longer life from them.
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Old 05-19-2012, 09:30 AM
 
Location: Floribama
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A lot of people have switched to the heated sensors, but I really don't see the need in it unless you're making a lot of short trips.
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Old 05-19-2012, 10:41 AM
 
Location: Earth
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Yes I do tend to make quite a bit of short trips. I presume a heated O2 sensor will tell the ECM to go into closed loop much quicker? And that is supposed to help improve fuel economy in the sense of short trips?
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Old 05-19-2012, 12:17 PM
 
Location: Texas
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^^^Correct
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Old 05-21-2012, 01:51 PM
 
Location: Eastern Washington
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I have never heard of retrofitting a heated O2 sensor to an older car - are people doing this?
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Old 05-21-2012, 02:25 PM
 
Location: Columbia, California
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I hope you all realise that a O2 sensor is screwed into the exhaust pipe. Short trips actually heat up the pipes even hotter. All a O2 sensor does is measure the O2 in the exhaust, being heated will not change the amount of O2 present.
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Old 05-21-2012, 02:59 PM
 
Location: Texas
5,653 posts, read 13,524,543 times
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Quote:
I hope you all realise that a O2 sensor is screwed into the exhaust pipe. Short trips actually heat up the pipes even hotter. All a O2 sensor does is measure the O2 in the exhaust, being heated will not change the amount of O2 present.
This is 100% wrong. Until the sensor reaches about 650F it doesn't even start to generate voltage to send signal to the PCM. In open loop the engine is running richer than normal which means the extra fuel also acts as a coolant. Exhaust temps are much cooler than it is when the sensors have reached max temps and the PCM adjusts the fuel trims to the normal 14.7:1. This is when exhaust temps are highest. An engine running rich means it's running cool exhaust temps, running lean means exhaust temps are high.
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Old 05-21-2012, 03:57 PM
 
Location: Floribama
15,475 posts, read 32,206,719 times
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Quote:
Originally Posted by M3 Mitch View Post
I have never heard of retrofitting a heated O2 sensor to an older car - are people doing this?
I hang out in a 3rd gen Camaro/Firebird forum, many there have switched to the heated sensor.
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Old 05-21-2012, 04:30 PM
 
Location: Earth
4,235 posts, read 21,402,134 times
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Quote:
Originally Posted by M3 Mitch View Post
I have never heard of retrofitting a heated O2 sensor to an older car - are people doing this?
I believe it's becoming a common mod. One of the boards I used to frequent, it was often in discussion though I never took the time to read into it. The single wire O2 sensor on my '91 S-10 is out. One of the replacements offered at the parts store is a heated O2 sensor. Costs more but had me wondering about it.
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