How long has your modification been on the truck? If it happened at the same time as your modification it might have something to do with the modification but probably not. O2 sensors are wear items which lose their ability to accurately send the O2 reading to the PCM over time. If you do replace it, OEM are the best sensors to buy. Nobody can tell you it is or it isn't the O2 sensor without diagnostics. Yes it can cause the symptoms you describe, but so can other things. Asking if it will cure all your ailments is asking a lot since driveability is so complicated. The O2 sensor range is approximately 1 volt, so yes, it is sensitive. Since the combustion event is suppose to be equal in all cylinders theoretically the proportion of oxygen is suppose to be roughly equal whether it's one bank or two. That of course assumes you have no issues on either bank which would cause a change in oxygen. Hope this helps. Gerard
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