Having problems with your 2003 Chevrolet Impala ?

Impala - trac off and ABS light along with service traction syst

\015 On our 2003 Impala the traction off light and ABS light comes on at the same time as the service traction system warning message. The traction control and anti-lock brakes engage and stay on while driving, making "mooing" and "groaning" noises. We were told it had to do with needing new brakes and rotors. We did so. It still does it! One mechanic told us that it needs the bearings to be replaced at $600+. But another more reliable one checked it and said that isn't the problem. So I Googled the problem and read that many Impala owners were having the same problems, getting expensive repairs made (one even for over $1000 in three separate stages of repairs) and was still having the problems. So is there a solution? My husband disconnected the abs module, tried driving it and it seems to have gotten rid of the abs and traction coming on and noises, but the abs and trac off lights stay on constantly. And it starts out with the warning message, but goes off after a few minutes.Help!\015 Posted / edited by AnonymousUser on : 20-01-2020

Answers :

THE PROBLEM IS WITH A HUB WHEEL SPEED SENSOR OR MORE LIKELY THE HARNESS LEADING TO THE HUB.

CHECK THE RESISTANCE AT THE HUB CONNECTION, IT SHOULD BE BETWEEN 900OHMS AND 1300OHMS. THEN SWITCH TO A-C VOLTAGE, IT SHOULD BE 100MV WHEN TURNING THE WHEEL BY HAND. IF BOTH CHECK OUT THE PROBLEM IS IN THE WIRING TO THE HUB.

THE RIGHT FRONT HUB USUALLY HAS A BEND, DOWNWARD THEN UPWARD NEAR THE CONNECTOR TO THE HUB. THAT IS WHERE THE PROBLEM USUALLY OCCURS.

NEW HARNESS WIRES CAN BE BOUGHT AT THE DEALER.
I agree with Amanda and BB1Bud. The problem is the hub bearing(s) and or wiring. I am a Ford Master technician but the Fords also have integrated sensors integral to the hubs on certain models. Sometimes the hub dries out causing metal particles to get on the sensor and the system does not operate correctly. In turn this sends a warning message along with warning lights to illuminate on the instument cluster. Also this can cause false ABS activation. The best way to determine a bad hub bearing is to " spin up" the wheels on a hoist and listen with a mechanics stethoscope at each hub near the mounting surface to the knuckle. A bad hub bearing will have a louder sound using the stethoscope than a good bearing and you will possibly find some side to side accessive movement in the wheel.
Repair Help & Product Troubleshooting for 2003 Chevrolet Impala

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