Had this happen twice on a road trip with my 2013 Ford C-Max Energi. Terrifying “Stop Safely Now” warning, pulled over on a dangerous interstate emergency lane. It allowed me to drive it 5 mph to the next exit where we had it towed to a AAA service center. They couldn’t figure out anything but reset the error codes. We continued on our way and made it 3 hours further when it happened again. Limped it to a Ford Dealer who also couldn’t figure out the codes and wanted $800+ to continue diagnosing, also telling us it may be a $2,500 fix or a $17,000 new battery. Helllll no.
Come to find out the key for us was likely this: Both times were within 1-2 minutes after filling up the gas tank. We learned later from another Ford salesperson who knew EVs better that you should never fill up the gas tank on a plug in hybrid because it can trip error codes. Nowhere in our eight years with this car had we heard that or experienced that. Had to pass this on!
