The check engine light keeps coming on in my parents' 93 S600. They took it in to the dealer and they told them that the EGR valves are bad (there's 2, right?) and that they had to be changed. After changing them, the light still keeps coming on. Any advise on what to do? Are the valves hard to change? I know it's just an emissions thing, but they hate looking at the Check Engine light all the time. Thanks in advance for any advise!
Linear Mode
