Freightliner Cascadia: Park Brake Air Low, Brakes May Drag Warning

A common problem with the new #freightliner Cascadia is the "park brake air low, brakes may drag" warning.
When the system is operating properly, the warning will come on with the truck in gear and the #brakes released if air pressure is dropping to 75psi or below.
When the system is not operating properly, and the switch is failing, it will stick and come on at higher air pressure readings, or possibly stay on at all times with the truck in gear and brakes released.
If you are getting this warning at pressures above 75psi, and there are no leaks in the system, the most likely problem is a switch called "brake pressure, low brake drag warning". Yes, Freightliner has a switch added to the system specifically for this warning. Why not simply use the low air pressure warning? Ask freightliner, I guess they wanted to complicate their trucks even further with unneeded parts.
To remove this switch:
1. drain all air from the air system.
2. remove the three trim panels below the steering wheel to access the switch.
3. disconnect the connector and unscrew the switch. This particular switch has a blue stripe on it, part number is 12-26771-000.
4. install new switch, reconnect connector.
5. veriy repair by starting truck and verifying warning turns off around 75psi.
6. reinstall the trim panels.
If you purchased all of the extended warranties from freightliner when you bought the truck, the part is covered under warranty. That said, the part costs around $50 from the dealer, and you can complete the repair yourself in under an hour if you have the part in hand.

[@paramjitmann9813]

Just bought 2022 with this problem. Thanks for Very simple video.

[@Myunsolicitedthoughts]

This had been driving me freaking crazy!!!

[@bizznesstingz2645]

Thank you, I am currently going through this, now I know what to do

[@blown0595]

This was a great video, straightforward and good camera work, thank you

[@Harman55295]

Thank You for making this video….. It helped me in replacing it easily

[@jasmine-cb4no]

I’m looking for that problem how to do repair now! Your saying in your channel right now! When I get back to repair it! Thank dude

[@dostahamza7464]

Thank you🙏

[@rubberduckyconvoy2723]

Thanks driver. I am Owner of 2019 Cascadia. The mileage is 455,000 I will replace tomorrow that sensor

[@deejaydhillon8415]

Thank you great video, saved me $$$ did it myself. However the part has changed, it looks like a red switch now. The parts guy said they have had so much problems with this switch so they use a different one now. Will have to buy a connector for new switch also.

[@SmittyD33]

Man you the mvp

[@habibrahman8472]

Good job

[@MaiTran-ym4xi]

Thank you for your video clips, it's really helpful. My husband's truck has a same problem, now it solved 👌 🙂 👍

[@Bigzero.Scratcher]

Just had this same problem yesterday 😂

[@Bigzero.Scratcher]

Yea i got it fixed the same day thanks for s great video

[@abdinour8606]

Thank you

[@cascadia7244]

I'm currently having the same problem. I'll be looking to replace this switch myself. Thank you.

[@MrTmwilliamson]

Very interesting

[@orpheus1662]

I’ve a 2019. And this only happens when I hook into a trailer. Any tips. And how much is that sensor. Thanks a lot

[@josechavez5855]

Have you had an issue with door honking stating parking breaks not applied and obviously are applied 😅

[@Pakistansave]

Thanks for uploading the video. I am facing same problem. I just wanna ask is there color matter like you mentioned blue & red I bought a new one it color was red is gonna be work for position mean same spot?

[@FreightRelocators]

Someone posted in another comment that the part had been updated and the color had changed, so as long as you verify they are giving you the correct part there shouldn’t be an issue.

[@franklincampbell8774]

Mine in a 2012 isn't the same as this one mine only has a red switch and only one with a plug the rest have prongs

[@xianreiss]

My local dealer just replaced the "Blue stripe switch" and after 1 week went back to the same issue. Thinking of disconnecting the damn beeper.

[@Slw7511]

you can insert a metal paperclip into the connector, but you will have problems during level 1 DOT inspection.

[@king53070]

Do you have to disconnect the battery?

[@FreightRelocators]

I didn’t.

[@guolili1812]

Now the dealer doesn't have this accessory, so I have to replace it with a new and different one, which is twice as expensive. too dark.

[@vampboi78]

What the heck. My truck has done this ever since I bought it with 170k miles. It has 474k now... I just thought that's what it was supposed to do 😳

[@TRANSPORTKING1988]

LMFAO 😂

[@MrRaghavpuri007]

Man i did it the sensor is fixed but i can hear air.. do you know what it could be?

[@FreightRelocators]

Lots of air lines down there that you have to be careful about moving around. If it's simply one of the quick connect air lines leaking, you may be able to fix it by taking it lose and replacing the o-ring.

[@MrRaghavpuri007]

I wiggle the sensor and it gets worse You think i need new sensor or just put teflon on it?

[@FreightRelocators]

@@MrRaghavpuri007 Did you get the sensor tight? Doesn't need to be real tight, just a little more than snug. Possibly overtightened and broke where it threads in at?

[@MrRaghavpuri007]

@@FreightRelocators i think i did over-tight it maybe What do i do in this situation?

[@FreightRelocators]

@@MrRaghavpuri007 verify exactly what is leaking first.