Question about Chevrolet Uplander

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2005 chevy uplander

Abs, Traction control, & stability lights on. Code c0400. Changed the transmission wheel speed sensor. Lights still on.

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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

chuck943
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SOURCE: 2001 Mercury Grand Marquis brake and ABS dash lights on and off

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

  • 1 Answer

SOURCE: 2007 Chevrolet Uplander LT ABS and TC light on

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

  • 1 Answer

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

  • 1 Answer

SOURCE: 03 Yukon Denali Traction Control/ ABS Problems

my 2000 yukon has the traction control light on and the abs light on any anwsers?

Posted on Nov 28, 2009

  • 128 Answers

SOURCE: I have a 05 Chevy Equinox awd, I had the same

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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1 Answer

Electronic stability control & abs & brake assist warning indicator lights are coming on after an accident. How serious are they?


You have damage to the front area brake system. It could be very serious but if car stops OK most likely not that serious you just won't have abs or traction control. The damage is most likely a speed sensor or something similar. I said it could be serious that is only worst case.
Here is a breakdown of what lights mean
ABS keeps your breaks from locking up
BREAK ASSIST helps your breaks
Traction control if you one wheels spin more than others system adjust wheel spiN

Dec 19, 2015 | Cars & Trucks

1 Answer

Have a hard fault code P0500


According to http://repairpal.com/OBD-II-Code-P0500:

Vehicle Speed Sensor Malfunction
Symptoms
  • Check Engine Light will illuminate
  • Vehicle may not shift properly
  • Speedometer may not operate correctly
  • In some cases, there are no adverse conditions noticed by the driver
  • In some cases, there may be performance problems and/or shifting problems.
  • Other warning lights may come on such as the ABS light and Traction Control light.
Common Problems That Trigger the P0500 Code
  • Defective Vehicle Speed Sensor
  • Defective Speedometer
  • Vehicle Speed Sensor wiring or connector
  • Communication (CAN) bus problems
  • Defective transmission or differential Vehicle Speed Sensor drive gear
Common Misdiagnoses
  • Speedomter problem
  • Internal Transmission problem
  • ABS/Traction Control probelm
  • Driveline problem

Mar 27, 2015 | BMW 325i Cars & Trucks

2 Answers

What does service traction control light mean? And service stabil track light mean?


Have the car scanned for trouble codes at a local auto parts store for free. If it is related to a wheel speed sensor, the sensor is replaced as part of the wheel hub assembly. Normally, the wheel nearing makes noise that gets louder as the parts go bad. The wheel speed sensor picks up these vibrations before they can be heard. The abnormal noises confuse the abs and traction control computer. An easy way to verify this condition is that when you first state the vehicle, all the trouble lights are dark. Once the vehicle starts moving, the light show begins.

Wheel hub swap on this vehicle can be done in one day on both front wheels. Typically, when one side fails, the other is not far behind.

Jan 11, 2015 | 2008 Pontiac Torrent

2 Answers

ABS/ Traction control light/BAS & brake light on in 2008 dodge grand caravan


It is safe to drive. You need a scan tool to get a code out of it. Could be as simple as a wheel speed sensor going bad. All of these lights will work together normally. The traction control uses the ABS to gain traction, and the Brake Assist System is part of the stability control. Also uses the ABS.

Oct 03, 2012 | 2008 Dodge Grand Caravan

2 Answers

My ABS light is on and off on a 2006 Mercury Mariner. Do I need to do something to get this light to stay off


SECTION 206-09: Vehicle Dynamic Systems 2006 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 03/29/2005 Anti-Lock Control adobe.gif Printable View (63 KB) The ABS consists of the following components:
  • Hydraulic control unit (HCU)
  • Anti-lock brake control module
  • Front and rear wheel speed sensors
  • Front and rear wheel speed sensor rings
  • Stability control sensor cluster
  • Stability/traction control switch
The ABS prevents wheel lock-up by monitoring the wheel speed sensors and actuating the HCU modulating the brake pressure to prevent wheel lockup. By preventing the wheels from locking up, the driver is able to maintain steering control and stop in the shortest possible distance under most conditions. The traction control system utilizes the same components as the ABS to prevent wheel spin and help maintain vehicle control during acceleration. The roll stability control (RSC) system utilizes the same components as the ABS and the traction control systems and also monitors the steering wheel position sensor and the stability control sensor cluster to assist in stabilizing the vehicle during abrupt maneuvers.
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The ABS module is self monitoring. The module will carry out a preliminary electrical check of the hydraulic pump motor by turning the pump ON for approximately 1/2 second either when the ignition switch is turned to the RUN position and the brake pedal is not pressed or when the vehicle is in motion and at vehicle speeds above 20 km/h (12 mph). The ABS module will also carry out a wheel speed sensor self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry when the ignition switch is turned to the RUN position, with or without brake pedal application. If a malfunction is detected in the pump or wheel speed sensors, the ABS module will shut down and disable the anti-lock system. Normal power assisted braking, however, remains.
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Visual Inspection Chart
Mechanical Electrical

  • Base brake system
  • Brake booster vacuum hose
  • Hydraulic control unit (HCU)
  • Steering components and suspension components
  • Tire size
  • Wheel speed sensor ring
  • ABS module
  • Battery junction box (BJB) fuse(s):
    • 19 (40A)
    • 22 (40A)
  • Brake fluid level switch
  • Brake pressure transducer
  • Smart junction box (SJB) fuse(s):
    • 6 (15A)
    • 34 (5A)
  • Stoplamp switch
  • Wheel speed sensor
  • Wiring, terminals or connectors


You may need to have the dealer run a scan test to determine the DTC fault codes. Then go from there. Autozone can't read these codes as tehy are chassis codes. They only can read powertrain codes.

Good luck. please rate.

Jan 25, 2011 | Mercury Mariner Cars & Trucks

1 Answer

Traction control light on ,brake light on ,abs light on


If the brake light is on, check the fluid level immediately and add fluid if necessary.
After that, have the car's OBD-II computer scanned with a 'Brake Scan' tool for OBD-II. This will help to narrow down which wheel speed sensor is giving you trouble. It might be a broken wire, or a bad wheel speed sensor.

The wheel speed sensor sends information to the ABS side and the Traction Control side of the computer module for ABS and Traction Control.

The car will revert to standard braking and regular non braking transmission power distribution to the drive wheels when the ABS and Traction Control lights are both on.

Good luck on this repair.

Dec 18, 2010 | 2006 Cadillac STS

3 Answers

I'm having a problem with the ABS brake and traction lights on the dash always on.


If the ABS light os on the brake and traction control lights will also typically illuminate. Your best option is to have the ABS system scanned to see what is causing the light to come on. Once you know the code(s) it will be a lot easier to figure out what the problem is.

Oct 22, 2010 | 1999 Oldsmobile Silhouette

1 Answer

Speedo suddenly not working and two warning lights appeared on dashboard one being ABS light warning light.


If the ABS (and likely the traction control) light came on at the same time that the speedometer stopped working, you likely have a faulty wheel speed sensor at the right rear wheel. You can test this by swapping the two rear wheel speed sensors (ABS sensors). If the speedometer then works (but the ABS & Traction control lights stay on), replace the sensor that is now at the left rear (was at the right rear). If no change, you may have a fault in the ABS & Traction control - control unit.

Rear wheel speed sensor at www.bavauto.com

http://www.bavauto.com/shop.asp?HC1=0&Htarget=search.asp&HCY=2001&HCM=330i&SearchStr=rear%20abs%20sensor

Nov 22, 2009 | 2001 BMW 330

1 Answer

I've got a 1999 Caddy Deville throwing a 0741 code and showing "Serv Traction Control" and ABS lights on on the dash. If I'm on a steep incline on dry pavement the traction control tends to come on when...


No you don't need any transmission work, the parts you listed are part of that. You either have a bad wheel speed sensor or more likey a bad connection at one of the sensors. Sometimes the cables get damaged. The cables are supposed to remain flexible but sometimes the wires inside break. These cables go from the wheel speed sensors and feed information to the ABS system.

Jun 20, 2009 | Cadillac DeVille Cars & Trucks

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