As my login, I have a 1989 240DL. My check engine light recentlycame on and the code was for "faulty O2 sensor signal". I changed the O2 sensor and reset the code and the light still came on after a few miles down the road. Wondering what else I can check to get this light to stay off?The carruns fine but, it does take a little bit more than usual crankingtostart the car. ( It was like that even before I changed the O2 sensor ).
Any ideas, suggestions?
Thank you.