p1715 cel error code

[ercp98]

what does this mean? the scanner says that the error code is P1715 Manufacturer Control Transmission. does this mean that my powertrain control module (PCM) is defective and needs replacement? when this happened the transmission would not engage. even though the gear selector was in drive. then the cel light came on. i shut of the engine and restarted the truck. the truck drove like nothing happened except that the check engine light was still on. any help would be appreciated.

[mxmikie]

how many miles ?? cel reset time ?

[ercp98]

truck has 86090 miles. so, just reset computer? but what is causing it to give a check engine code?