The "check engine" light came back on. I pulled the codes and the error code is P1000 and the sub code is 249. The truck has all new catalytic converters and O2 sensors (all 4) within the past 90 days. Does anyone have any ideas?

 

Under your driver's seat, make sure all the plugs are snug on the transmission module then reset your codes

 

Yea, just checked all connections as well as the fuses....not that.