My engine light came on, I took it to the dealer to see what was going on, they ran a diagnostic and said it was my cd player making the check engine light come on...and that they couldnt fix it unless I bought the new radio unit....this doesnt make sense to me..the raidio/cd/navigation/blue tooth all work fine..and why would this be connected to the engine?? I am a woman and I dont understand this at all..