Steve, if your scanner is able to read live data then that will help you with troubleshooting. You can pull the battery cable and reset the pcm but if the circuit is reading out of limits then it will come back until you see what is going on. If you have good voltage coming into/going out of your sensor maybe your current sensor is the issue.



Knowing what voltage the map sensor is seeing/returning to the PCM will help you narrow it down. Try looking at this https://www.corvetteforum.com/forums...-dtc-p0108.pdf

If the sensor voltage checks good, then reset the battery cable and check it out again later. Some codes will come up and not trigger the CEL light. Maybe it was a one time issue? WHo knows. Oh, and if you have to replace the sensor, buy AC Delco. No cheap autozone stuff.