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Old 03-04-2012, 08:09 AM   #1
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2nd Lambda Voltage

Hey guys, was wondering if anyone knows the average voltage output from the second lambda. Thanks.
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Old 03-04-2012, 10:09 AM   #2
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.5 volts
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Old 03-04-2012, 04:05 PM   #3
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Thanks. I am running about a .63 at idle, and revving it up to brings it to .78. Does this sound like my catalyst is ineffective?
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Old 03-04-2012, 06:24 PM   #4
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Do you have a CEL? Or are you curious to see if your cat or o2 sensor is a problem?

Also the voltage will fluctuate when the throttle is depressed and released. It should settle to around .5 v. If you have .63v at idle what about cruise? should be about the same. It could be the o2 sensor starting to fail also, but its not really that bad of a reading.
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Old 03-04-2012, 07:43 PM   #5
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Well, I am not running a catalyst at all. Let me first insert "track use only configuration" disclaimer. I am using an o2 simulator to circumvent the check engine light. See link here I may need to use a different jet, but have done 150 miles now and so far no check engine light has come on. I just wanted to know what the range should be because I was not able to find it in WIS. They only list the range for the first sensor.

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