Could just be a connector came loose or got corroded. Chech teh mail trans connector on the trans.
---------- Post added at 08:26 PM ---------- Previous post was at 08:25 PM ----------
The PCM will command a default gear to protect the engine and transmission when certain faults occur. Default or (limp-home mode) depends on the actual gear the vehicle was in when the fault occurred.
For gears 1-3, the default will be 3rd gear.
For gears 4-6, the default will be 5th gear.
The default gear is held until the vehicle is placed in reverse, park or the vehicle is restarted. After these action(s) the vehicle will default to 3rd gear
---------- Post added at 08:26 PM ---------- Previous post was at 08:25 PM ----------
The PCM will command a default gear to protect the engine and transmission when certain faults occur. Default or (limp-home mode) depends on the actual gear the vehicle was in when the fault occurred.
For gears 1-3, the default will be 3rd gear.
For gears 4-6, the default will be 5th gear.
The default gear is held until the vehicle is placed in reverse, park or the vehicle is restarted. After these action(s) the vehicle will default to 3rd gear