I have switched out the wheel speed sensor on my cts 04 and the tc,abs and service brake assist lights are still on. The code shows up as c0040 which is the right front speed sensor. Any suggestions?
Could be a wiring problem or the object that triggers the sensor.
SOURCE: my speedmeter only works for about a half mile
The correct scan tool with tell you the specific issue with you ABS & TC system, AKA EBTCS, or electronic brake & traction control system. This computer system reads the speed of each wheel by sensor and magnet wheel.
If you had it scanned & replaced the sensor that was bad, then remove the wheel and take out the sensor by hand. Look in the hole in the wheel hub and inspect the wheel magnets for any damage or corrosion. This can be replaced if damaged. Apply a small amount of bearing grease to sensor and reinstall.
If your scan shows a comunication problem with the control module, then it can be easily removed and repaired for under $200 at modulemaster.com
Air or contamination in the brake system can also cause an issue. Bleeding the ABS module takes a command from a scan tool, and it will pump for 10 seconds. Make sure you have a bleeder open on one of the calipers. Then bleed out all the brakes by pumping the pedal and hold, then release pressure in line by unscrewing bleeder screw and closing it after 2 seconds, then release brake. Repeat a few times, and listen for air bubbles to go away, if any.
Good Luck!
SOURCE: i have a 2004 Cadillac
The ABS module may be bad if it has false ABS, TC, and Brake Light on and the Shift lock won't release.
SOURCE: ABS TURN LIGHTS COME ON
need to get abs codes read. it will tell you what wheel to look at.
1.bad wheel bearing, sensor is part of bearing.
2.broken wires to sensor.
3.traction control part of abs
SOURCE: location o the speed sensor,requires replacement
try autozone.com to see if they have your car listed for diagrams pictures and step by step instructions if your car is not listed then try your local library they have all the car manuals and even copy them for you and www.schramauto.com or call 1-800-292-1032 they sell only GM parts
SOURCE: check engine light, brake assist, and tc light on
I had the exact same issue it sounds like, I had to take the car in and have a hose changed out because it had gotten punctured somehow. This caused the computer sensors to go crazy.... cost was around $150.00.
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