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hi i have some problem in my impala Trac Off, ABS, Service Traction System three lights come?

but when i was checking wiff ma computer it showing Catalyst System Efficiency Below i dont understand anything please help me

2 Answers

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  • Anonymous
    10 years ago
    Favorite Answer

    Most likely cause is a bad ABS wheel speed sensor. Plagues all GM cars. Have had the same issue several times on my Pontiac. Requires changing the sensor/wheel bearing unit. A better scanner will show the affected wheel.

  • 10 years ago

    I would recommend contacting your local dealer for more specific information. They should be able to provide you with a diagnosis and point you in the right direction. I can also locate a dealership in your area with your zip code or look into this further with your VIN. Please feel free to keep me posted via email if you would like. Thank you.

    Tricia, GM Customer Service.

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