I am getting a "traction active" message on my dash board screen. Which is activing my traction control on dry payment when taking off from a stop. I am worried this is going to mess up my transmission. I have read about the wheel speed sensor corroding in areas where salt is used on the roads. This problem just started after we had ice/snow.
Please help. My truck has 50k with expired warranty it is going to cost me $150 just to have it looked at.
Re: 2005 GMC Yukon Denali - Traction Control issue
Your problem is the front wheel speed sensor. I had the same problem on my 2004 Denali. The GMC dealer felt there was nothing wrong, no codes. I replaced both from wheel sensors (about $75 each on Ebay) and the problem is fixed. The passenger sensor had a crack in it. I saw this solution on a discussion chat. There was a TSB for the 2002 pickup trucks with the same problem. Hope this helps.
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How do you know brake pedal positioning sensor needs to be replaced ? Traction light on ? DTC'S - diagnostic trouble code's stored . That's why cruise won't engage . Taking your vehicle to a qualified repair shop an having it diagnosed is what you should do.
Cruise Control Inhibited
The engine control module (ECM) inhibits the cruise control operation when any of the following conditions exist:
• The ECM has not detected a brake pedal activation from the body control module (BCM).
• A Cruise Control System DTC has been set.
• The vehicle speed is less than 40.2 km/h (25 mph).
• The vehicle speed is too high.
• The vehicle is in PARK, REVERSE, NEUTRAL, or 1st gear.
• The engine RPM is too low.
• The engine RPM is too high.
• The system voltage is not between 9-16 volts.
• The Antilock Brake System (ABS)/Traction Control System (TCS) is active for more than 2 seconds.
Do the stop lamps work ?
DTC P0703 Brake Switch Circuit 2
The body control module (BCM) monitors the brake pedal position sensor. When the brake pedal is applied, the BCM detects a predetermined voltage signal. The BCM sends a GMLAN serial data message to the powertrain control module (PCM) indicating the status of the stop lamps.
DTC P1574 Stop Lamp Switch Circuit
The stop lamp switch signal circuit is a direct hardwire input to the throttle actuator control (TAC) module from the body control module (BCM). The TAC module monitors the stop lamp switch signal circuit in order to detect when the brake pedal has been applied. When the brake pedal is pressed, the BCM sends a GMLAN serial data message to the powertrain control module (PCM) indicating that the brake pedal has been applied. The BCM also sends a high voltage signal on the stop lamp switch signal circuit to the TAC module. The TAC module sends a universal asynchronous receiver transmitter (UART) serial data message to the PCM indicating that a brake pedal application has occurred. The PCM will compare the UART serial data message and the GMLAN serial data message in order to confirm that both serial data messages match.
I'll start with the code reader. Most simple readers will only read engine codes. You need a professional scan tool that does everything to access the body computer data. It could be a wheel sensor which the ABS system uses, or one of the other components in the ABS system.
If your vehicle is equipped with the Traction Control system, this message will stay on a few seconds after the traction system stops limiting wheel spin.
This message will appear when the traction control system is limiting wheel spin. Keep in mind that when the warning lights turn on, a fault code is stored in the ABS
control module (in this case). Retrieving, diagnosing, and repairing any ABS system
faults will be necessary to keep the light off. A common fault with ABS
systems are the wheel speed sensors, stored codes may confirm this.
A good way of testing the traction control is to stop on a slippery road and then take off fast as to spin the wheels there when wheels start to spin the traction should activate and stop the spinning wheels you may hear it kick inand a light on the dash will say trac active or trac on, as far as sliding when stopping this is where the abs would come in,abs anti skid brake system, this system when you are braking would release the sliding or skidding wheel and you would felt it in the brake pedal, good luck, hope this helps.
Your car has what is called "traction Control" when wheel slip is detected by the system it takes control of the brake system and stops the spin, some cars call this Stability Control, if the light is always on then the system has a failed part and is turned off by the control unit.