Question about 2004 Chevrolet Tahoe

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How to determine if a wheel sensor is the reason that the ABS activates and the traction control comes on

After new brake pads and rotors all the way around and new tires all the way around. Traction control activates from a dead stop and ABS activates as the vehicle comes to almost a complete stopm.

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  • Bradley McClellan
    Bradley McClellan Nov 30, 2012

    If I hold steady pressure on the brake pedal until the vehicle comes to a complete stop the ABS does not activate. And the traction control does not activate with the ATC switch off eliminating a possible transfer case/4wd problem.

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  • Chevrolet Master
  • 75,817 Answers

You must use a tool that reads ABS system fault codes.

Posted on Nov 30, 2012

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Posted on Jan 02, 2017

tbirdfan1
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SOURCE: ABS LIGHT AND SERVICE TRACTION CONTROL LIGHTS

Hello there:
There is a abs wheel sensor that is on the hubs on these vehicals that should be changed if the light that you are getting comes and goes this happens when the signal from the sensor to the abs system has been interupted you can take it to autozone and have them clear the code for you till you can get this repaired these sensors can cost around 150 to replace ok

Posted on Jul 14, 2010

  • 13 Answers

SOURCE: ABS and Traction Control Light On

Because the brakes were changed, either one of the sensors were broken when removing brakes or it has set a code. Go to your local autoparts store and have them reset the code. See if it comes back on. If it does you will need to look at the ABS sensors on each wheel and replace if damaged

Posted on Sep 29, 2009

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Abs light came on


What it looks like: The traction control warning light typically takes the form of the acronym "TC." Sometimes this light is a small illuminated picture of a car losing control What it looks like: The traction control warning light typically takes the form of the acronym "TC." Sometimes this light is a small illuminated picture of a car losing control. How this system works: Traction control uses wheel speed sensors to detect when one or more of the car's wheels lose grip and traction. When the system registers a loss of traction in one or more of the wheels, a computer will limit power to the wheels that are still in solid contact with the road to prevent a skid. Common reasons for this to happen:
  • ABS is malfunctioning: Traction control and ABS (anti-lock braking system) often share the same control module and internal self-diagnostics system. As a result, sometimes an issue in the ABS can trigger the traction control light. If this is the case, then both the ABS and Traction Control lights will be on.
  • Broken wheel speed sensors: Wheel speed sensors are usually in the wheel bearing assembly, and determine the rate at which each wheel is moving. The sensors relay that information to the traction control module, which determines whether or not power needs to be shifted. Wheel speed sensors can get dirty or damaged and stop working, which prohibits the traction control module from knowing when to enable the system.Traction control module is faulty: The traction control module - which, again, is often shared with the ABS - can malfunction and break altogether, causing the system to stop working. What to expect: A top-rated mobile mechanic will come to your home or office to determine the source and cause of the traction control issue, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs. How important is this service? It's important to have the traction control issue investigated as soon as possible, as adverse driving conditions can arise at any time. While your car is unlikely to incur further damage from a faulty traction control system, it won't be safe to drive in rain, snow, sleet, or other inclement weather, or even possibly through pools of water on the road. Furthermore, the issue that is causing the traction control light to illuminate could also be impacting the ABS.

Sep 30, 2016 | 2006 Pontiac Torrent

1 Answer

My 2007 Crown Victoria Police has the brake and abs light on, traction control is off. Brake pads and rotors are less than 5000 miles front, new rear. Get diagnostic code U1900 and U1262 front car.


You probably have a wheel speed sensor issue. With the proper scan tool that can access the ABS module it will tell you the exact issue.

Jan 12, 2016 | Cars & Trucks

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Why does the "service traction system" and "service ABS" light to come on when driving?


The service ABS light on while driving means that the ABS wheel speed sensor is defective or a broken wire that goes to the sensor. You now only have regular braking. This means that you can now lock up one or more wheels with hard braking. Then the car can swerve either left or right while braking hard. The traction control must also rely on the ABS wheel speed sensor to keep both front wheels spinning at the same speed for safety reasons. This prevents loss of control of your car while getting better traction with the tires.

Jun 25, 2014 | 2000 Pontiac Montana

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Chevy equinox 2006 Brakes Grinding, Pulsating, and Resisting


You did not mention rotors but that could be the source of the grinding. The pulsating probably is traceable to your ABS and traction control syatems

Apr 10, 2013 | 2006 Chevrolet Equinox

1 Answer

Saturn vue 2004 intermittent abs and traction control comes on and after restarting shuts off?


Has this happened after you replaced the sensors for the abs. if so they have to be set at a gap close to the rotor sensor to read correctly. The other thing maybe if the new sensors area slightly different to the original ones the abs might be having trouble identifying them.
The last one maybe, could the new brake pads be causing flexing or pushing against something resulting in this intermittent problem.

Jun 13, 2012 | 2004 Saturn VUE

1 Answer

The check trac control warning and track contr. light stays on while driving, is this brake pads?


It can be the pads. The wheel sensors count the revolutions of each wheel. On some rear drive differentials there is a sensor in the Differential that can go bad. But if the Brake pads are in pieces, the wheel sensors view can be blocked and the sensors lose count.

The Traction control will activate. Traction control can work in several ways. Some controls activate the rear brakes until both rear wheels are spinning the same RPM. This is destructive to the brake pads. Additional Traction control will cut the engine by choking it or interfering with the Ignition. When the rear wheels spin the same RPM, power is restored. This system is easier on the brakes.

The Emergency brakes are inside the rear Rotor if you have 4 wheel disc brakes. The sensors are in the Drum portion of the Rotors. A lot of Brake shops fail to check the E brakes because so much has to be disassembled. Your Mercury should have a Button on the dash to turn off the feature. Turn it off until you can have it checked.

Sep 03, 2010 | 2004 Mercury Montery

3 Answers

Traction control and anti-locks(ABS) lights come on.


Traction control and anti-locks(ABS) lights come on there is sensors that are pluged in behind the rotors check and see if they are disconected or loose sometimes when you change your brake pads they might come loose and not making contact.

Jul 06, 2010 | 1998 Cadillac DeVille

1 Answer

My traction control on my 99 Merc Grand Marquis intermittently activates, typically on right hand curves, even though I am easy on the gas and it is dry. This means the car will not speed up and will only...


Some differentials have a speed sensor in the Differential casing. You may want to go to Autozone for exact info.

Most likely it is debris from the Emergency brake pads on the rear drums. The back rotors have a drum built into the reverse side.

The traction control sensors work with the ABS and when the rotation of the wheel is different from side to side, the system activates the Traction control. This applies the rear brake to a single wheel and can wear out the disc pad. The Trac control also can throttle down the engine by choking off the air intake.

Most likely all the debris is spinning at different RPMs and is simulating wheelspin. The sensors can be manually cleaned as well as the large hub "star" which the sensors get their reading from. You will see when you get it apart.

Oct 09, 2009 | 1999 Mercury Grand Marquis

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ABS and Traction Control Light On


Because the brakes were changed, either one of the sensors were broken when removing brakes or it has set a code. Go to your local autoparts store and have them reset the code. See if it comes back on. If it does you will need to look at the ABS sensors on each wheel and replace if damaged

Sep 29, 2009 | 2005 Chevrolet Equinox

2 Answers

ABS light goes on and off


Sounds like you have loose brake pad linings.
The traction control measures rotational speed between each rear wheel. If your pad lining momentarily causes one wheel to hesitate your trac control will flash. As the ABS detects braking without the brake pedal being pushed, it will flash.
Check your emergency brake pads. They can fall apart inside the drum/rotor combo on the rear. That is where your sensor is for the ABS.

Aug 15, 2009 | 2003 Ford Mustang

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