Q: Advance Trac dash light comes on and the brakes are applying.

asked by on December 20, 2016

My f250 work truck has the advance trac light that comes on. When that happens the brakes engage and I have to pull over. The brake pedal is spongy all the time and when I bleed the brakes, the front do fine but the rear bleeders are bone dry with no fluid at all. I have a bosch computer that tells me all my wheel speed sensors are saying the same thing so I assume the speed sensors are working. I have to unplug the abs sensors on the rear axle and delete the codes and then plug them back up and delete the codes again and wait like 10 to 15 minutes before I can go again. I can fix a lot of things but this one has got me. Please help!

My car has 130000 miles.
My car has an automatic transmission.

Hi there. When the Advanced Trac light comes on and then the brakes are being applied, this means that the traction control system is active. The traction control is designed to apply the brakes to a wheel when the wheel is spinning out of control. Check all of the wheel speed sensors and make sure that they are working properly. Also, check the main controller to the Advance Trac for any loose wiring or damage. If everything is checked out to be functional, then I recommend replacing the Advanced Trac controller. For the bleeder screws not having any fluid coming out of them, either there is a leak in the brake system or the combination valve is stuck shut and there is air in the system. If you need further assistance with a spongy pedal and the traction control coming on, then seek out a professional, such as one from Your Mechanic, to help you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Converting manual transmission to automatic

In order to do this swap, you will need to have the powertrain control module(PCM) from the vehicle that has the manual transmission. The PCM from your automatic transmission truck will likely not work when the manual transmission is installed....

What's the difference between the ECM and PCM?

The engine control module (ECM) controls all the engine functions to keep it running correctly monitoring all the sensors of the engine. The power train control module (PCM) will include multiple control modules in one case called a PCM. The...

Oil catch can?

I used an oil catch can on a 2001 Pontiac Montana with a 3.4 L V-6. I think it was made by American Machine Works. It's very well designed with nice stainless internal baffle. The 3.4 L engine is prone...

2011 Camaro SS A6 trans. performed a tune then reset car back to stock. now trans shifts slower 2-3 in D but not in S sport mode

The learned, adaptive shift points have possibly been lost or modified. With enough time, they will re-set. However, if you remove power to the PCM and TCM (both are involved in adaptive shifting), new shift points will be learned and...

Noise coming from rear wheel

A rubbing or scrapping noise coming from the rear of this vehicle is most commonly caused by one of two things. The rear wheel bearings that are part of the rear hubs are going bad. These wheel bearings are not...

Do the seats fold down to become a flat surface? 2011 Honda CR-Z

After some research, it seems that the panel does in fact fold down to create a larger cargo area on some models. Consult your owners manual for the specific procedure on folding down the separation panel in your vehicle.

if I need brake pads, rotors, and calipers, how long can I wait before I get the calipers? is it ok to just do the pads and rotors

Hello. If you are going to do the brakes then the calipers should be done at the same time. If the calipers are needed and are not done when the brakes are done then you run the risk of having...

Can't get an emissions test due to faulty plug

Hi! Since the power fuse was blown and your attempts to install a new fuse causes sparks, it would seem that there is a large draw or short on that power system. First, disconnect the ground cable to the battery...

My engine light came on approximately 10 months ago. I had a diagnostic test ran on it. It stated that I needed a TCM.

Hi there, thanks for writing in. The traction control module is a part of the ECM, but usually is a separate component from the main control module. The best way to solve the issue is to have a professional mechanic...

Related articles

How to Buy a Good Quality Brake Pedal Pad
Think Think about how often you use the brakes in your vehicle, probably very often. With that said, over time your brake pedal pad can become worn down and even lose its ridges and traction. The last thing you want...
Top 10 Brake System Issues Every Car Owner Needs To Know
Every driver should know how to check for problems with car brakes. Warped rotors, leaky brake hoses, and squeaky brakes are among the most common.
How Bad Driving Prematurely Wears Out Your Car
Bad drivers and bad driving habits can cause strain on car parts, especially the tires, brakes, body, and electrical and steering systems.