Q: My car has an S3 flashing light and the Check Engine Light is on

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My gearshift is loose. I can still switch the gears but if I'm driving down the road and I rest my arm on it a little hard the gear will easily shift to another gear in which ever direction I move. Is this the reason why my check engine light come on and the gear s3 flashing light flashes? My car drives fine ..
My car has an automatic transmission.

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