2006 Ford F150 4.2L Code P0720: No Forward Gears, Reverse and Park Working
I own a 2006 Ford F150 with a 4.2L engine. Recently, I've noticed that the vehicle has no forward gears—only reverse and park (and neutral) function properly. The check engine light triggered a code P0720. I visited a parts store, purchased an output shaft speed sensor (OSS), and installed it. Additionally, I drained and replaced the transmission fluid and filter, noting no excessive metal shavings or burnt discoloration in the fluid. After reconnecting the battery and restarting the vehicle, the code cleared temporarily—but forward gears still don't engage, and the P0720 code reappears every time I attempt to drive forward. The issue persists despite these efforts. What could be causing this? Any troubleshooting suggestions or diagnostic steps?
For detailed information on trouble code P0720, refer to the official forums or technical documentation. Possible causes include: - Output shaft speed sensor malfunction - Faulty electrical wiring or connections - Transmission fluid temperature sensor issues More details available at: https://www.p0720.com