Error code 4SNS/1/40000000: VDOR-18.678 & 18.679

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Error code 4SNS/1/40000000: VDOR-18.678 & 18.679

MBP early 2011: I just ran the AHT twice, first run gave me an error code of 4SNS/1/40000000: VDOR-18.678, second run gave code 4SNS/1/40000000: VDOR-18.679. Does anyone know what these error codes relate to? My best guess is possibly the RAM, I have (2) 8gb 1600Mhz DDR3 modules installed OR the wireless networking hardware. I've noticed recently while multitasking the wifi connection seems to hang up and web pages will not load/downloads will stall. But the way apps will hang for 60+ seconds reminds me of a bad RAM situation I've had in the past. Any help would be greatly appreciated since the nearest genius bar is a 2 1/2 hour drive. Thanks!

MacBook Pro, OS X El Capitan (10.11.6)

Posted on Aug 20, 2016 11:05 AM

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Answer 1

Best reply

Grant Bennet-Alder

Level 10

127,717 points

Aug 20, 2016 5:42 PM in response to Darth_Vato

Not RAM -- 4SNS is a sensor error.

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Answer 2

Darth_Vato Author

Level 1

9 points

Aug 20, 2016 5:42 PM in response to Grant Bennet-Alder

Thank you for that. Now does anyone know which sensor this code is referring to?

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Answer 3

Aug 20, 2016 9:16 PM in response to Darth_Vato

Darth_Vato wrote:

error code of 4SNS/1/40000000: VDOR-18.678,

You do not say what model or year Mac you are running—is this a Retina machine???

This Sensor error points to the Direct Current Voltage sensor on the board.

In short your best bet is take it in for assessment:

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test

Genius reservation http://www.apple.com/retail/geniusbar/

on-line https://getsupport.apple.com/GetproductgroupList.action

check warranty https://selfsolve.apple.com/agreementWarrantyDynamic.do

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Answer 4

Aug 20, 2016 7:22 PM in response to leroydouglas

Those numbers (18.678, 18.679) are usually readings that the sensor is getting. I don't know anything that should be as high as 18.67 Volts. I hope your Mac does not suffer any internal damage before you get it fixed.

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Answer 5

Darth_Vato Author

Level 1

9 points

Aug 20, 2016 9:18 PM in response to leroydouglas

My apologies, this is an early 2011 MBP, A1278. I will take it to the Apple store tomorrow and have it checked. Thank you for your help!

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Answer 6

Darth_Vato Author

Level 1

9 points

Aug 20, 2016 10:10 PM in response to Grant Bennet-Alder

Me neither! I know someone already mentioned that it couldn't be the RAM, but I just noticed that the recommended RAM speed is 1333Mhz and the RAM I have installed is 1600Mhz. Even though they use the same voltage of 1.35v could that be part of this issue or another issue in itself?

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Answer 7

Aug 21, 2016 7:30 AM in response to Darth_Vato

some RAM will downshift and work properly. If you had RAM problems, you would get seemingly random kernel panics. This may be a power adapter or battery problem.

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Answer 8

Darth_Vato Author

Level 1

9 points

Sep 23, 2016 10:53 PM in response to Darth_Vato

UPDATE: So, I took my MBP to an apple store and explained to a "genius" the issue I was having. They ran some tests and told me everything was working as expected. Then they cleared some caches and tested the wifi while plugged in and charging and it worked!! Awesome!!

But when I got home, I had the same **** problem again...FML. So, I took into account that while at the apple store they used one of their own power adapters (Apple branded 60w) and at home I am using an aftermarket 80w adapter, which just happens to put out 18+ volts.

Now I go back and buy a brand new Apple OEM 60w charger from the Apple store...get home, plug in and check the wifi...connection drops again.

Last ditch effort, I buy a new belkin AC1200 dual band router and voila!! My MBP wifi works perfectly, plugged in, unplugged and I even tried while connected via ethernet (charging and on battery) and success.

FINAL SOLUTION: Get a different/new router.

Apparently the D-Link DIR-655 wireless N router that I had been using did not like when my MBP was charging while connected to the router via wifi or ethernet and somehow killed the internet connection it was broadcasting to all connected devices.

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