Originally Posted by
samgm2
I don't think this is true. The fact of the matter is that MOST GM's produced since 2005/2006 use a virtual composition sensor. My understanding from talking to GM Goodwrench mechanics is that the detection takes place when five or more gallons are added to the tank. Moreover, the E37 and E38 computers came out AFTER the conventional composition sensors were discontinued. The use of the old composition sensor with these computers shouldn't be required. These OS's support virtual composition sensors.
I went out today and purchased a FFV E-37 and I plan to install it into my non FFV Cobalt. If this test works, then it means that the function is 100% software and we simply haven't found how to enable the virtual composition sensor (software utilizing O2 sensor information).
We need to.
When the GM Goodwrench mechanics can tell you why GM uses hard sensors on 2011 vehicles when they could use VFS, please share the thinking with all of us. Current OS's support both hard and virtual sensing. And agreed, it IS in the software. If GM Goodwrench mechanics can tell you where, that would be great to know.
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