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Why are trac off and cel lights both on

(1992 Lexus LS400)
in Cedar Knolls, NJ on October 06, 2011
i had both rear os replaced, do i need to replace front os too
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Popular Answer
of Shade Tree Garage on October 07, 2011
I will be happy to read the fault memory for you. Anything that effects emissions will put the MIL on even a transmission problem. If the tracs lamp is on it may be the reason the MIL is on.
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