Started getting "propulsion power reduced" error about 2 months ago. Car is still under warranty. Brought it in and said the 12v battery was defective. We replaced with a new one. Error came back after two weeks. Every time the cars Lithium battery depletes and then sits for 20 minutes, when it starts we always get this message. So we tested a theory and let the battery fully drain for about 4 days without starting the car or charging it. Then we received a check engine light. Brought in to dealer a second time with more run around and bs from techs who obviously do not work on Volts very often. They recommended we replace our EVSE (which is only 2 years old, because they noticed a little melted area on the wall end (old outlet was replaced after overheating 14 months ago). Car charges fine every night. We did receive a letter from Onstar offering free monitoring from the issue, HOWEVER they CANNOT see when the code rears its head...nothing shows on the computer...so WHAT was the POINT GM??? After "updating" the computer and clearing our code, it still happens and the local dealer said it was "NORMAL" now, apparently? My wife drives this car every day and loves it, but reduced propulsion is a very dangerous thing in fast moving traffic, or negotiating turns...I smell class action or recall. This is ridiculous. GM come on!

TWICE IT'S HAPPENED TO ME. SWITCHING FROM ELECTRIC TO ENGINE, THE CAR JERKS, ENGINE STARTS TO SCREAM, REVVING HIGH, ERROR MESSAGE COMES ON "REDUCE PROPULSION", CAR LOOSES SPEED, NO GAS PEDDLE, COMES TO A SLOW STOP, STALLS. TURN CAR ON, ENGINE REVVING HIGH, BURNING SMELL IN CAB OF CAR. DRIVE CAR OFF FREEWAY, AT WHATEVER SPEED IT WILL ALLOW, THEN SUDDENLY THE REVVING STOPS AND ENGINE RESUMES NORMAL.

MK SMITH CHEVROLET IN CHINO CA, VERY NICE, TOLD ME IT WAS MY FAULT, WAS DRIVING IT IN MOUNTAIN MODE. THINKING THAT IT COULD HAVE BEEN ME, ACCEPTED IT AND 3 WEEKS LATER, IT HAPPENS GAIN. THIS TIME, CAUGHT IT ON VIDEO, TESTED THE DRIVE MODE, SURE ENOUGH, WAS IN "NORMAL" MODE. THE EXACT SAME EXPERIENCE, ONLY THIS TIME, WAS AT 4AM AND NOT IN HEAVY TRAFFIC.

THIS IS A SAFETY ISSUE, LIVES COULD BE AT STAKE, NAMELY MINE! I'VE EMAILED CHEVROLET DIRECTLY, EMAILED THE MK SMITH AND HOPING THEY WILL STEP UP TO THE PLATE AND FIX IT. WHEN YOU GOOGLE VOLT LOSES PROPULSION, YOU CAN SEE OTHERS HAVE HAD THE SAME PROBLEM. THE CAR IS UNDER WARRANTY, SO WHAT IS CHEVY WAITING FOR, SOME TO BE SERIOUSLY HURT BEFORE THEY STOP SCRATCHING THEIR HEADS?

Update from Feb 27, 2017: George's Chevrolet in Bellflower has had my car for a month now, still cannot locate the fix. They have asked me to pickup the car twice, and I've asked the is it safe, they respond by saying GM is still investigating. I've paid a month for a car I'm not driving, and $60 in gas per week, estimated loss out of pocket for the month $850.