Dodge B1246 Dim Panel Potentiometer Switch Circuit Failure Description OBD-II Trouble Code Description for B1246 Dodge Dim panel potentiometer switch circuit failure Mercedes OBD-II Trouble Code Description for B1246 Dodge PTS Parktronic: A42b1 (left outer sensor, front bumper) The plug connection has poor contact or is loose, or the sensor or cable is faulty