I bought a used 2014 eco diesel. Two days later the check engine light came on . The dealership I bought it from came and picked it up and took it to their mechanic. He replaced two sensors and they brought it back. Two days later the light came back on. The came and got it again. This time they...
I just did the update for my 2014 and the blue def sensor is sending erratic messages to the computer. Now my check engine light is on. Can I unplug it and reset it myself. Or do I havo take it to the dealership?