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ABS kicking in when it shouldn't be...

mikeplan14

mikeplan14

New member
Having issues with the ABS on my wife's '04 GP, that are driving me crazy! The ABS is kicking in at low speeds when coming to a stop at a light or pulling into a parking space. This is intermittent. Some days the ABS warning light on the dash will come on, along with warnings on the center counsel display, informing that the ABS and traction control need serviced. But most of the time, none of that is displayed and the ABS will still kick in a couple times during a drive to work. It applies for just a short period of time, but enough that it scares you for a second. This occurs in moisture free driving on clean roads...

I have repaced the front hub assemblies (since the wheel bearings were shot anyways), and also replaced the passenger side ABS harness that plugs into the hub assembly, but the problem still remains.

Any ideas?
 


Scan data will be the only true way to see which wheel is giving an erroneous signal. Abs kicks in when it sees multiple or missing mph between each wheel. There will always 1 to 2 mph difference when turning. If the lights turning on its storing a code. If the lights not on check history.
 
So if the light isn't on, a scan can still bring up previous codes? The light rarely comes on, and when it does it doesn't stay on very long at all. That is why I have had a hard time diagnosing this...
 
mikeplan14 said:
So if the light isn't on, a scan can still bring up previous codes? The light rarely comes on, and when it does it doesn't stay on very long at all. That is why I have had a hard time diagnosing this...
Click to expand...

Its worth a shot. I don't know how long exactly codes are stored in history but its certainly worth shot as I know they do get stored if the light comes on.
 
I have had the same problem twice, i had the wires to the speed sensor made longer by moving the wires closer to each wheel. Solved the problem. Mechanics told me to replace speed sensor, which was not the solution.
 


So you guys swapped in new hub assemblies (to get the new speed sensor)? I have already replaced the front hub assemblies, and returned them after a year and did it a second time (because I thought that they maybe had bad speed sensors). I have not done anything with the rear hubs, so that could be the issue maybe
 
You gotta stop wasting your time and money just throwing parts at it. Diagnose it properly. Fix it right fix it once. You could have a bad abs module. Abs pump abs relay bad hub st any 4 wheel. Just because you replace the hub and sensor doesn't mean the other 25 ft of wiring is replaced. Figure out which wheel is giving you problems. There's checks you can do with volt meters and what not. But you could spend a lot of time and money and get nowhere
 
My ABS would sometimes pulse at slow speed while turning into parking area or my driveway especially when raining or wet surface, Sometimes the ABS/Tract lights would come sometimes not, Scanned C0245 - Wheel Speed Sensor Frequency Error (Frequency difference between the left and right front sensors) Pulled front rotors off and found evidence of a grab-slip-grab-slip condition on the passenger side rotor, surfaces of both rotors were mirror smooth with very slight scoring, very well glazed and a nice deep color blue, typical at 112,000, figured I'd just go ahead and install new rotors, pads were at about 50% so I cleaned them up and reused them. Took a while to reset itself , Have not seen issue since new rotors, now at 179,000 issue /code has not returned.
 


I swapped out the front hub assemblies because the wheel bearings were shot, and then the ABS issue occurred. So I pulled the hubs back out and swapped them with the lifetime warranty. I will have to check it with the volt meter method and see if I can find anything.

Mine pulses just like that! The right rear brake was having some issues recently - the outside pad was really worn down and oddly worn (very drastically compared to the all the other pads), but the rotor was not discolored or anything. I put new pads (under lifetime warranty) and rotors on (since the rotors were well warped). The caliper seemed to float fine.... The ABS issue still plagues me.
 
Does anyone know what the test is with the volt meter?

I have not yet replaced the rear hub assemblies/speed sensors. I just want to make sure that one of those assemblies is the problem before I replace it.
 
i seem to have same problem. at low speeds my abs kicks in and my abs kicks in when i am stopping. causing me to not stop in time like i would like. i took my car in for inspection and the mechanic told me my drivers side wheel bearing is bad. so i replaced it today hoping it would cure my problem with abs and hollowing as i drive since its loud. well too bad he was wrong, noise and problem still there. has to be the passenger side.
i figured since my rotors were warped i would replace them and brakes too while i replaced my wheel bearing hub. and yet i still need another wheel bearing.
stupid cars cost a lot of money.
 


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