So I had some charging issues last week, the alternator would only charge at highway speeds. Any time I pushed in clutch or came the a stop I was seeing down to 12v flat. While limping it home I lost my speedo and the tachometer would die and come back. I could get the speedo to work if I turned the car off and back on while rolling, but the tach would still occasionally act erratic.

I replaced the alternator and I am STILL experiencing these cluster issues. Charging system is working as it should now.
I had codes U1001 and p1212 stored in the system. When the speedo quits the car seems to run super rich and I have a noticeable loss of power

my vsc and abs lights have been on forever since I mainly use this as a track car. But I’ve never had any codes till now.

i have a track event this weekend and need to remedy this!!!