Brake warning light

[Path214]

Im getting a brake warning light, the brakes seem fine, just the warning. I will say this has occurred at least 6 times with a month long gap between instances. The one common factor is a very hot day with the Bronco sitting in direct sunlight for the hottest part of the day. It never happens at night or early in the morning. Ive seen the other threads on here but they seem to have a brake failure associated and the vehicle being operated at the time, my instance doesnt. Its a first start up on a hot day.

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[Poppavein]

Perhaps a code is stored that provides more details?
OBD scanners are reasonable.

 

[Boreal]

Im getting a brake warning light, the brakes seem fine, just the warning. I will say this has occurred at least 6 times with a month long gap between instances. The one common factor is a very hot day with the Bronco sitting in direct sunlight for the hottest part of the day. It never happens at night or early in the morning. Ive seen the other threads on here but they seem to have a brake failure associated and the vehicle being operated at the time, my instance doesnt. Its a first start up on a hot day.

2.3L or 2.7L??

If 2.3L, perhaps SSM 50472 and Vacuum Line MB3Z-2420-K

 

[Flying Skunks]

Mine started this after the last update . throws code UO422 , which says is poor or lack of communication with a BCM . But like you stated , Very random upon when it comes on and or off

 

[Path214]

2.3L or 2.7L??

If 2.3L, perhaps SSM 50472 and Vacuum Line MB3Z-2420-K

Its the 2.7, Ive seen the thread about the "vacuum line in the 2.3," and the symptoms arent the same, I have no difference in brake pedal pressure or a loss in ability to brake. I'm thinking it has something to do with the heat and a sensor. Thought other might have encountered this particular issue, and wanted to be able to relate it to the mechanic.

 

[Path214]

Mine started this after the last update . throws code UO422 , which says is poor or lack of communication with a BCM . But like you stated , Very random upon when it comes on and or off

Ok, so Im not the only one, lol. Yeah I think there was an update just before this happened a month or so ago. Drove it yesterday and no warning, difference was early morning and about 30 degrees cooler. It seems when its around 100 out and been sitting in the sun this warning occurs.

 

[Flying Skunks]

Your not crazy , but not sure temps have anything to do with it as mine came on this AM , and turned itself off about 5 miles later . It in the low 80's this am

 

[flip]

DM me your VIN and I'll look at the VHR.

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