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Old 08-30-2015, 07:56 PM   #1
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Question Battery Current Sensor Meltdown

Hey all. So my car wouldn't start today and it seemed to be a battery issue so I went to take the battery out and take it to advanced auto parts.
Upon taking the cover off it looked like the negative terminal, clamp, and sensor had moss growing on them there was so much crossion built up. The acid has eaten through the sensor on the negative terminal and it is now fallen off the terminal base.
I have included a link to an incur album with the affected parts. I was wondering if any one could tell me what the parts/part numbers are. It looks like I'll need to replace the Orange piece, the sensor, and the connector that plugs into the sensor.
Focus Battery Problem - Album on Imgur


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Old 08-30-2015, 10:00 PM   #2
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Originally Posted by DersFace View Post
Hey all. So my car wouldn't start today and it seemed to be a battery issue so I went to take the battery out and take it to advanced auto parts.
Upon taking the cover off it looked like the negative terminal, clamp, and sensor had moss growing on them there was so much crossion built up. The acid has eaten through the sensor on the negative terminal and it is now fallen off the terminal base.
I have included a link to an incur album with the affected parts. I was wondering if any one could tell me what the parts/part numbers are. It looks like I'll need to replace the Orange piece, the sensor, and the connector that plugs into the sensor.
Focus Battery Problem - Album on Imgur
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Generally, if the corrosion is occurring on the negative terminal, your system is probably undercharging. If on the positive side, it is probably overcharging. Most often it will be seen on the negative side because the battery is usually in an undercharged situation. This is just the nature of the beast, I'm afraid.

Don't forget that!

Might check the charging system (or use the car more frequently/ or some charger love?)...

My 2012 have 0 corrosion on either terminal (but I do plug my battery when I don't use the car for 1-2 weeks or more)
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Old 10-29-2016, 12:27 PM   #3
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Hi DersFace,
Wondering what you did with your battery sensor/terminal. Mine did the same thing. The battery acid corroded the sensor and melted the connector and wires. I cleaned the terminals... but the sensor connectors need to be replaced. Any advice is much appreciated!

Thank you!
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Old 02-19-2017, 02:26 PM   #4
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Motorcraft Pigtail Catalogue
2 cavity connector
Sensor - Battery Current

WPT-1396
DU2Z-14S411-AZA
$14.00

I had this happened on my 2013 2 liter AWD Escape Titanium. I replaced my negative cable "Battery Management System" (AV6Z10C679M) sensor was destroyed and male connector was melted!
No Ford dealer parts men could identify it!! Said it is part of the wiring harness!!
I found this on my own after hours of searching!!!
This works on all late model Fords!
TooOld and ELCouz like this.

Last edited by waverunner10; 02-19-2017 at 02:43 PM.
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Old 02-19-2017, 05:23 PM   #5
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Greeeeat. I've been putting off cleaning up my terminals due to probably needing a battery soon. This is not good news...
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Old 02-20-2017, 09:55 PM   #6
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I am sure your negative cable was loose!! just like mine was!
this caused all the corrosion and damage! AND UNDERCHARGING BATTERY
make sure you replace the negative cable with sensor attached ford item only!!
$41.00 AVZ6Z10C679M
2 cavity connector male sensor battery current $13.59
WPT-1396
DU2Z-14S411-AZA
new motorcraft battery 590 cca $119.00
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