My car recently failed inspection. Check engine light indicated a po401 code. egr vales were replaced. engine light came on 4 days later. I did notice that when I initially start my car i see a small puff of blue smoke. Could there be something else wrong that the check engine light came on again? do you have any idea how much it would cost for a valve job if this is required and is it dangerous to let it go for a while?
Apr 13, 2008 at 4:26 PM