It means that there is a code present in the transmission computer.
Its clear no codes everything ok
Trouble code P0234 means:Engine overboost condition
my book says code 0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH A CIRCUIT HIGH INPUT
#2 warm air heater relay wiring fault
detroit diesel code 128 148 14pid
P1693 : Dtc detected in the companion module. You need to check the Ecm and Pcm for codes. Which ever did not have p1693 will have a code.
Pull egr tube and check for blockage. clean as required and clear code. if code come back replace sensor The little tube along the passenger side of the engine will be plugged with soot at the thermostat housing.
po261 reads out of the book "Cylinder 1 Injector Control Circuit Low"
Trouble code P0753 means:Shift solenoid A electrical
Trouble code P1740 means: TCC Solenoid or Overdrive Solenoid Performance
Burn diesel.