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I bought a used 2016 C-Max Energi with ~30K miles. Driving it home from the dealership on the freeway with a 1/4 tank of gas it abruptly showed the yellow wrench icon and a 'See Manual' message and went into limp mode (5MPH max). Obviously quite scary and dangerous to be reduced to 5MPH max speed on the freeway. I tested the voltage of the 12V battery and it was at 12.2 volts so I thought it might be related to the original battery not holding a charge anymore. A new 12v battery didn't seem to fix the problem as the yellow wrench/power loss has happened again two more days in a row. If I let the car sit for an hour or two it will finally start up again and let me drive it home. I am now going to take it to the dealership, but any recommendations on how I can troubleshoot this issue or get the dealership to reproduce the issue would be very helpful, as it seems to only happen after driving for a few hours. In Engineering Test Mode there are no fault codes stored, but I have not yet done an ODB scan. When the car fails during driving, I get the following messages: https://imgur.com/a/m8rsuek Check Park Aid See Manual Stop Safely Now Check Engine Light Yellow Wrench Light Red Triangle Exclamation Point Light Then for the hour or two the car refuses to start, I press the brake and press the ignition button and I hear a click in the battery compartment but the car does not reach Ready To Drive, it fails to startup and instead shows me the following errors on the left instrument panel screen: https://imgur.com/a/W3C5hA0 See Manual Park Aid Fault Check Park Aid On the infotainment screen at this time it displays this (not sure why?) "Vehicle charge. Your vehicle is set to be fully charged at" https://i.imgur.com/ZJfjlrJ.png. There is no charge icon on the dash, so I'm not sure if this is just an infotainment bug related to the yellow wrench or something serious? The last time this happened the 12v battery was at 12.45 volts. When I started the drive the 12V battery was above 12.6V. From what I understand 12.45 is borderline low but shouldn't prevent the car from starting? I have confirmed when my car is running normally it is supplying 14V to the 12V battery as expected.

I've had this car 13 months now, been without it for nearly a month earlier this year while my dealer chased down multiple water leaks on the roof and in the hatch area. Now I'm getting a yellow wrench light. Taking it to the dealer again. I just had the oil changed and they updated the computer with a new program based on a recall notice. I only have 5200 miles on this car, and I'm very disappointed in it from a quality and reliability perspective. Especially being so far down the road in its product cycle.

Hi Everybody! I just got a 2013 Energi last week and I'm loving this car so much!! Took me awhile to get everything setup and working and a few readings of the manual to understand all that this amazing car can do. I have a question for everyone, Whenever I use Cabin Preconditioning I get the yellow wrench and a warning to see the manual after I start the car each morning. I'm not sure what the issue is as everything seems to be working normally. I'm using 110V and its not exactly what I would call Cold yet here in Michigan this winter but before I unplug the car in the morning I hear the fan running and the car is defiantly not cold so I know its working. Has anybody had this issue? Is it because i'm using 110v so there is a power issue? I can immediately get the wrench to go away by turning the car off and on again a 2nd time. One other question! I notice in the mornings when the ICE runs the steering wheel shakes (vibrates) like crazy, It only does this when its cold. Is something lose to cause this? Thank you so much!!