My engine light came on today. I called Onstar and they ran diagnostics but didn't find anything. I came home and saw P1F0B (& associated P1E00) on my ScanGuage. I reset them. Later I was out and called Onstar who transferd me to the "diagnostics center". They ran diagnoistics again but didn't find anything (perhaps because I cleared the code unless the past ones are stored/saved).Hmmm the Onstar advisor kind of messed this up. P1E00 is merely a generic DTC [diagnostic trouble codes] that indicates that an undetermined fault was detected by the Hybrid Powertrain Control Module (in this case it was the P0CD2 charge door fault) and thus is requesting the Check Engine Light illuminate on your IP. So these two DTCs will ALWAYS be a matched set. (and the P1E00 will actually be persent in combination many hundreds of other DTCs as well)
They said if it happens again to call Onstar and as for the "diagnostic center".
P1F0B seems unique as not many hits on the web. A/C would only run in my 30ish degree weather to defrost so I'm not too concerned at this time.