Q: Check engine light
Was told by mechanic that my cam shaft was old so he replace it for $50 then deleted codes and the check engine light were off but today they are back so it hasn't gotten fix I don't want my car to shut off in the middle of the road my friend told me it could be a cylinder ignition coil problem but I don't know which one they seem good also my car shakes when I stop or drive faster than 40 mph at random times
My car has 17200 miles.
My car has an automatic transmission.
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