Help: Truck just threw these codes today

Dirtyguy24

New member
Dec 7, 2019
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My 2003 LB7 just threw
[P0700] Transmission Control System (MIL Request)
[P1621] Control Module Long Term Memory Performance
And my info panel says Range Shift Inhibited and idea on these?
I know I have to get the code out of the TCM
 

dndj

Boost!
Apr 13, 2019
135
1
18
Oregon
My 2003 LB7 just threw
[P0700] Transmission Control System (MIL Request)
[P1621] Control Module Long Term Memory Performance
And my info panel says Range Shift Inhibited and idea on these?
I know I have to get the code out of the TCM
P0700 means there are other codes stored in the TCM, post back when you have read those out.

P1621 is frequently set by incomplete programming or other internal failure of the ECM. Seems to happen with Bullydog programmers. Is your truck stock?
 

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