Question about Chevrolet Uplander
Abs, Traction control, & stability lights on. Code c0400. Changed the transmission wheel speed sensor. Lights still on.
There is no c0400 there is a c0040 left front wheel speed check the wiring at the speed sensor about 3 to 6 inches from the conector on the body harness for a brake in the wirring
Posted on Apr 06, 2014
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Posted on Jan 02, 2017
The red brake light is the key here. That usually indicateds a hydraulic problem. Check you fluid level in master cylinder and see if it is low. Also the level indicator sensor there in the master cylinder maybe sticking or corrioded. If ABS sees the red brake light it will shut off and turn on the ABS light,also traction control would be disabled as well.
Posted on Feb 05, 2009
We were having this problem...have your wheel bearing checked out. There was a sensor in the drivers side wheel bearing...once we replaced it (because it was going out) the ABS and Traction Control warning lights stopped coming on.
Posted on Jul 02, 2009
SOURCE: abs light/traction control light
You can check out what the trouble code is by pushing and holding the information button and the up arrow (right side of instrument cluster above the radio) until all the instrument clusters light. Press the information button (last) to enter test mode. I've had an error C1234, meaning Left rear wheel sensor fault. I found the problem to be a corroded connector under the chasis just under the rear left door about 2 feet in. I had to by-pass (replace 1 wire due to corrosion at the connector.
Posted on Sep 15, 2009
Is the sensor tone ring in the bearing or on the side axle. If the ring is internal to the bearing have you replaced the bearing when you replaced the sensor (sold as one unit normally, aftermarket). If the tone ring is external, check it for cracks or loose fit on the axle. Also the wiring integrity of the sensor from the connector in the wheel wheel back to the EBCM (electronic brake control module) should be checked as well. hope this will help you
Posted on Jan 31, 2010
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