Today when driving home of I-64 through southeastern West Virginia, I noticed the check engine light was on. I don't know exactly when it came on.
When I called OnStar I was given two codes P0C4A - "Battery Voltage Sensing System" or something similar. The OnStar said to take it to the dealer within a week. The other code was P1E00 - "Engine Propulsion Control System", which seems to be a general error message. OnStar had no recommendation about service for this code.
We had a couple unusual events occur during our week-end trip. When drive east on I-64 the Volt went into reduced propulsion mode about a 1/2 mile before the top of a long grade. Also, we stayed at the Greenbrier Resort for 2 days. The only place we could plug in was at the resort garage, and that was only after moving several cars around. We left the car charged in for 2 nights while I went off on a charity bicycle event. I really don't know exactly when the check engine light went on. We noticed it after about 60 miles of driving on the return leg of our trip, but I'm pretty sure it did not come on before we started our trip.
I tried to call the Volt Advisor, but the number I have doesn't seem to be working. Is there a new Volt Advisor number? (The number I used was: 877-486-5846)
I'd like to arrange to take the car to a dealer, if those codes really mean something is wrong. As the Volt isn't for sale in this region yet, I'd like to make that appointment through the Volt Advisor.
Any advice would be greatly appreciated.