Dan M Purcellville , VA November 29, 2015 F 51 error code Replaced the rotor position sensor and associated wiring. Not sure why the entire wiring harness and vacuum tube needed to be replaced, but I could not find the sensor as a standalone part. Anyhow- it was fairly easy to get done, and happily fixed the problem. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes