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6.7L Power Stroke Diesel 2011-current Ford Powerstroke 6.7 L turbo diesel engine

My brake light turned on and traction light too

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Old Oct 12, 2016 | 07:03 PM
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My brake light turned on and traction light too

So I was driving on a bumpy road and all the sudden my brake light turned on and traction control light also, my truck still brakes but today I was on a cliff at a light and I notice my truck slipping I don't know if I was slipping backwards or forwards obviously something is wrong. How do I troubleshoot this to find the problem thanks. the truck is a 2011 f350 dually truck the breaks look good I changed them not to long ago. Should I check the calipers if I take the wheels off I'm obviously going to change the breaks since they have lifetime warranty. Anything helps please I need this fix asap as this is my only vehicle and I use it to make a living. No abs light on, it's turned on when my truck was rocking side to side on a ****ed up West Texas Road. The fluid seems ok I used dot 3
 
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Old Oct 12, 2016 | 07:32 PM
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check the fluid for the hydroboost if you have a diesel. Are you sure that you were pushing the brake pedal enough to hold the truck? Recheck for leaks since you have a light on and the reported slipping.
 
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Old Oct 12, 2016 | 07:48 PM
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Ok maybe I wasn't pumping break hard enough because I pressed it harder and it did stop. Yes it's a diesel and the fluid is good, my friend checked the code and it was the brake fluid code
 
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Old Oct 12, 2016 | 07:50 PM
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You think maybe a leak like a bleeder non is not tite enough or I was thinking a caliber got stuck last time a caliber was stuck but no lights came on
 
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Old Oct 12, 2016 | 07:56 PM
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suggest a complete fluid check of the master cylinder and the hydroboost.


I would then start checking at least one front and the opposite rear. Pull the tires and have a look at everything.


If you cannot find anything wrong then I would re-bleed the brakes and see if that helps.
 
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Old Oct 12, 2016 | 08:26 PM
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Ok thanks what fluid do you suggest I use this time?
 
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Old Oct 12, 2016 | 08:30 PM
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brake fluid should be what is required per the owners manual.


Or on the cap of the master cylinder. Nothing special. Maybe some air in there.


The Hydroboost resevior should also be checked. I think that is ATF.
 
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Old Oct 13, 2016 | 07:19 AM
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Where is the hydroboost located? It doesn't say on the manual
 
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Old Oct 13, 2016 | 07:22 AM
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Is that another name for power steering?
 
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Old Oct 13, 2016 | 06:06 PM
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power steering and the booster for the master cylinder are combined.


There is a reseivor on the left side of the radiator. Check it as well.


Less likely to have caused your symptoms.


It really sounds to me like you should take it in and have someone diagnosed and fix your issue.
 
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Old Oct 13, 2016 | 07:05 PM
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Yea it turned out to be a speed sensor
 
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Old Oct 13, 2016 | 07:22 PM
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speed sensor or the brake sensor?
 
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