Alright so it was 8 degrees here this morning and when I looked at the dash, without even putting the key in, the Theft light was flashing real fast...
This is a new symptom and never happened before.
Put the key in and light still flashing like crazy and I get crank--no start.
Perform the PATS reset (key in, turn to on for a minute etc) and now it starts fine.
No codes stored in ECM. Also tried Cluster Diags and no dtc stored there either.
Starts up every time now.
I'm wondering if I have a +5vref problem?
It only happens when ice cold out, like 20 degrees and below.
Maybe the PCM relay has moisture in it and it doesn't allow the contacts to close because it's frozen?
I've seen posts from people who had the RFID antenna for PATS causing problems in extreme cold and the solution was to use a hairdryer on it for a little bit to warm it up. That's crazy!
So, any ideas?
P.S. I never get the easy ones like blown fuses
Like I said, this is a brand new symptom here. Previously, prior to installing the new FRPS, the theft light was behaving normally.