Just had tune up done, but my V70 AWD shakes while driving especially on
on the high way, check engine light is on, ? spark plug used. wonder what is wrong?

 

Does the car do the same at lower speeds or while idling? I am not familiar with AWD models however I would check what the code is first. Then I would get the wheels balanced as long as the shaking/vibration is not associated with any funny sounds.

Which parts were replaced for the tune up, and what brand parts did you use?

Usually if the tune up was the cause, the car would act different usually while idling. Also, it would great if you mention the year and whether its a R model AWD or the Cross country AWD.

 

Hello, Who did your tune up? Was it running smoothly before the tune up? What prompted you to get a tune up? What does "? spark plug used" mean?
Like they say, "The devil's in the details", and you gave us none.
Hear from you, Kira