I have a 09 dodge ram i chandged my battery then my abs esp and the traction light came on plus the message came on that said park assist disabled

SOURCE: abs brake lights come on and stay on

Replace the speed sensor in the rear end.

George Fischer

• 236 Answers
• Posted on Jun 21, 2009

SOURCE: 99 buick park ave traction control and abs lights

you may have to replace the ball bearings. in an abs ball bearing assembly there is an electronic plug in that goes bad

SOURCE: XK8 ABS FAULT LIGHT COMES ON INTERMITANTLY PLUS

Number of possibilities. Most likely culprit is wheel bearings. Have these checked. Big heavy car and wheel bearings do take a hammering on XK and XJ's. Once they go, the wheel speed sensors are out of line with the tracking ring and a fault code is thrown. As the TCS uses the same sensor, this also throws a fault. Next in line is the ABS unit (it's hardly ever the main block, but ECU itself, companies on the net offer rebuilt units. Finally it can be the ABS pump unit - but the fault codes will show if this is the case - or you can pull the pump unit plug out of the ABS unit and see if it has continuity with a multimeter - should be a low number of ohms. 8 times out of 10, it is wheel bearing.

SOURCE: my abs, traction control and parking brake light

Because you apparently have no knowledge of OBD govt emission
systems, that have been on our vehicles for the last 30 years

Any light on the dash, is a possible system malfuntion
You surely have heard of codes you get from the diagnostic
connector under the dash
You use the codes to follow a trouble chart, to a solution and repair
That is the short version

You need a local repair shop,the days of working on your own
car in the driveway, left about 1981 with the OBD1 and now OBD2
Systems (1996 thru 2011)

SOURCE: ESP/BAS warning light on. went

Hi, these systems are all linked together. Most commonly, one of the wheel speed sensors is not reading or is reading incorrectly. This can also occur on slippery surfaces where one or more wheel slides enough to cause the sensor to drop the signal, but not enough to meet criteria for an abs or esp episode. If the light comes back every time you turn on the ignition, there is a deeper problem.
The system has detected a fault in the electronic stability program - brake assist system. You have an electrical connection at the rear wheels secured to the inside of the brake area and are viewable from under the vehicle. It is a small wire harness running to each wheel. Grab the connector and wiggle it around, and make sure they are tight. Due to the connector being mounted low to the ground, sometimes they become dirty or corroded, not making contact. Do this on both sides and see if the lights turn off.

If the light does not turn off, you have to replace dynamics sensor, which is mounted UNDERNEATH the center console in the car. There is a "lost communication to dynamics sensor" and "low voltage to dynamics sensor supply"..