Mach E Won’t Start

[jrlandeen]

Hey everyone, I recently had my Mach E towed to ford. I woke up and it was a complete brick. Both the unlock button on the key and on the door wouldn’t unlock the car but it would flash the headlights like it does when it does unlock the car. My first thought was 12v so I tried to jump the frunk and no luck. So I resorted to trying to kill my 12v enough to jump the frunk by hitting buttons on my key till it was dead. After about an hour of this my car suddenly unlocked. Not only did it unlock it started and could drive like there was no issue. I had a new warning on the dash saying to safely stop now as well as in the app it said high voltage battery warning. So I decided to try to reset the computer and disconnect 0v side of the low voltage battery. After waiting 30 minutes I reconnected it and tried to start the car. The car was dead again. I could turn on the middle screen and it would play music and I could use the screen but hitting the start button wouldn’t even turn on the gauge cluster screen. I couldn’t lock the doors or run up and down the windows. Nothing. No accessory mode even. So I tried to jump it and still nothing. Any ideas? 12v? HVJB? It’s at ford but it’s been 4 days without any comment from them.

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[B177y]

12v? HVJB?

50% chance of either one of those.

Best bet is to be a PITA to the service manager until you get an answer.

 

[jrlandeen]

should have added 2021 Mach E GT

 

[B177y]

should have added 2021 Mach E GT

Have you had the HVBJB replaced previously under the recall?

Replaced the 12 volt yet?

 

[jrlandeen]

Have you had the HVBJB replaced previously under the recall?

Replaced the 12 volt yet?

I bought the Car in May, replaced the 12v when I had a warning in the app, and the car has 0 outstanding recalls. I’d assume it’s been replaced under recall.

 

[B177y]

There's definitely older threads where the early Mach-e's had multiple HVBJB replacements. @HuntingPudel used to brag about how many HVBJBs he blew up in his first Mach-e

Also lots of threads about new 12 volts going kaput after a few months.

If you have access to an OBD reader you can pull your codes and see what's up. Otherwise you just have to be the squeaky wheel and keep bugging the service department until you find out what the issue is.

As long as you're under 100,000 miles the HVBJB should still be covered under the HV warranty, and if the new 12 volt battery is bad, that should be under warranty for 36 months.

 

[HuntingPudel]

There's definitely older threads where the early Mach-e's had multiple HVBJB replacements. @HuntingPudel used to brag about how many HVBJBs he blew up in his first Mach-e
<SNIP>

Naah, I only blew up the one HVBJB. A few people on the forum blew up more than one though.

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