[Tinman99]

So when I start my truck when it's cold, if I don't let it warm up for a bit before I put into gear I get a check engine light with these codes. Once it warms up a little bit I can clear the codes and the truck drives perfectly fine. Shifts through all gear fine. Could this be something as simple as the pressure switch manifold? Or anyone else have this issue before? What did yours end up being?

 

[Tinman99]

It's happened when it's below 40s. Have to wait about 15-20 mins and it doesn't seem to do it. I just bought the truck a year ago but it was sitting. I'm not sure when the last time the fluid was changed. I plan to do it soon. Later this month or next

 

[Tinman99]

Ok is 54 degrees today. I started the truck and this is what the trans switches read
Park: TFP C ON
TFP D ON
TFP E ON
TFP R OFF
SHIFT SOLENOID C ON
SHIFT SOLENOID D ON
SHIFT SOLENOID E ON

IN DRIVE:
TFP C OFF
TFP D ON
TFP E OFF
TFP R OFF
SHIFT SOLENOID C OFF
SHIFT SOLENOID D ON
SHIFT SOLENOID E OFF

IN REVERSE:
SOLENOID G OFF (PREVIOUSLY ON)
TFP C OFF
TFP D ON
TFP E ON
TFP R ON
SHIFT SOLENOID C OFF
SHIFT SOLENOID D ON
SHIFT SOLENOID E ON

No CIL this run cycle seems to happen more when it's colder

 

[Tinman99]

But I did notice that the fluid was pretty low. Not dirty though.