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Old November 30th, 2008, 08:10 PM   #1
99BlaZeR2
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Default 2003 Chevy Impala traction issues

I have a 2003 Chevy Impala and sometimes when I accelerate from a stop it jerks as if its starting in second gear and then shifting back down into first gear causing a jerk. Sometimes the traction control light and the abs light come on. Also when backing out of my driveway the traction control will turn off and the display will read "service traction soon" along with the abs light coming on. This issue has me stumped, I thought it was a wheel speed sensor but when they were checked nothing showed up on the computer. Any help is appreciated.

Thanks,
John
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Old November 30th, 2008, 08:58 PM   #2
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Yeah sounds like a wheel speed sensor to me. How were they checked I belive you need to check resistance or something?
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Old November 30th, 2008, 09:41 PM   #3
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Could be a WSS but also there is a TSB about wiring coming in contact with the tie rod ends and getting damaged, the fix is a new, updated wiring harness to the wheel speed sensor(s) I can email the tsb if interested.

You can check the sensor by unplugging it, checking resistance (850-1350 ohms) and then hook your voltmeter to the sensor, set it on AC voltage, spin the wheel. should be well over 200 mv, but more importantly compare it to the other side should be very close. if not replace the low voltage one.
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