Diagnosis help on nbsu

[Yellow is Good]

Trying to figure these tranny code to confirm a nbsu failure. Tranny indicator is intermittent and shows the physical signs/clunks of the nbsu problem, but here are the codes with the problem.

P0700- believe this turns of the check engine light
Unk. B1440 - no idea can't figure out
Tcm p0562- again can't find this definition.
Tcm po872- believe this is limp more if my research is correct.

So do these code match up with a faulty nbsu?

Thanks.

The truck is a 04 lly all stock! Not the one in my sig

[StealthBoogie]

P0700- refers to a transmission control system malfunction
b1440- power mode master input circut mismatch
Tcm p0562-System voltage low(tcm).transmission control module
Tcm po872-Pressure switch E, usualy means a stuck E shift valve

[Yellow is Good]

Originally Posted by StealthBoogie

P0700- refers to a transmission control system malfunction
b1440- power mode master input circut mismatch
Tcm p0562-System voltage low(tcm).transmission control module
Tcm po872-Pressure switch E, usualy means a stuck E shift valve

First off thank you! Where is a good place to reference these codes? Is there a list somewhere? I tried Google to get what i got.

Do any of these issue correspond with a failed NBSU switch on the 5 speed Allison?

To me the power mode mismatch and TCM low voltage could correspond with the corrosion issues that the switch usually fails with.

Thanks again for the code definitions!