Need help with O2 Sensor Voltage analysis
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Member
Joined: Mar 2004
Posts: 127
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From: Atlanta
'03 S55 AMG, '01 CLK55 AMG
Need help with O2 Sensor Voltage analysis
Anyone know whether these plots shows anything significant, or is this normal?
I am curious as to why the graph for Sensor 1 voltage output is so different than Sensor 2 voltage. I'm attempting to teach myself all about this stuff, but obviously I am a novice. I'm hoping that
I am curious as to why the graph for Sensor 1 voltage output is so different than Sensor 2 voltage. I'm attempting to teach myself all about this stuff, but obviously I am a novice. I'm hoping that
Last edited by epj1906; Jan 16, 2007 at 07:47 PM.
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Joined: May 2006
Posts: 99
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From: Los Angeles
Enterprise rent-a-car!!!
front and rear O2 sensor voltages are different because the perform different function. The front one is used to control fuel mixture, the rear is used to check the cat is working. a normal o2 sensor voltage will fluctuate between 40 and 750mv, the rear one will start fluctuating after holding the rpms steady, and over 2500rpm for 3 to 4 minutes, but it will fluctuate at a much slower rate than the front.
Hope that helps
Hope that helps
Last edited by damaged; Jan 24, 2007 at 09:07 PM.
