My check engine light came on my 95 850 turbo wagon and I pulled the codes and I got 2-1-4. I changed the RPM sensor and not only do I still get the 2-1-4 code, I now get a 5-3-5 code. Please help

 

535 is a turbo regulator valve fault code. Did you clear your codes after you changed the sensor? And did you miss plugging something back in? Double check that - that'd be my guess.

 

Check your work and see if you missed something or knocked something loose. You need to use the panel to reset and then see if the codes pop back up. Or easier, swing by an autozone or oreilly and have them plug into the OBDII port and get the codes cleared.