Electrical System Related Problems of the 2018 Ford C-max

Table 1 shows two common electrical system related problems of the 2018 Ford C-max.

Table 1. Electrical System related problems of Ford C-max

Problem Category Number of Problems
Car Will Not Start problems
1
Electrical System problems
1

Car Will Not Start problem #1

Electrical gremlins since the first day. Touchscreen went on and off, phone didn't charge, door handles don't work, garage door opener forgot settings, presets on dash would blink out of memory. Ultimately the car didn't even start. But for all of these problems, sometimes they would work, sometimes they wouldn't. Ultimately got the yellow wrench of death. Brought it in repeatedly and they could never reproduce the problem, until the day it wouldn't start at all and the wrench was on the dash. Finally diagnosed open seams on the back hinges to the hatch. Seamseal was missing on both hinges. Water was coming into the junction box which was soaked. The battery was sitting in a pool of water. These problems happened whether it was parked or running.

Electrical System problem #2

Steering locks to the point that it can't turn. Happened while driving. Unknown cause. Warning light came on for driver to park. Issue unresolved and can no longer drive car.


Electrical System related problems in other Ford C-max model year vehicles:



C-max Service Bulletins
C-max Defect Investigations