I've done the search on the p0748 code and know what it is. Does anyone know why I would get this code just by dropping the pan and changing the filter, andjusting the bands, and filling the tranny. Truck is still on the jack stands in the garage. All I did was start the truck and slowly go through the gears with the brake on. I cleared the code last night and started the truck this morning and it tripped again. I'm a little confused but maybe when I adjusted the front bands could I have knocked the sensor somehow? Could it be from not topping off the fluid yet?

Trans is a 46re.

Thanks for any advice.

 

Did you pinch one of the wires between the filter or pan by accident? Or knock off one of the electrical plugs.

 

Don't think so? I am taking a guess that this solenoid is in the pan I just don't know where. I guess I'll have to drain the pan and look at this huh?

 

Yep, it's in the pan next to the valve body. And if you have not already done so, install a drain plug in the pan. Life will be alot easier.

 

Drain plug was just put in this service so eventhough I don't want to pull the pan the plug I installed will make it easier. I'm new to this transmission stuff so I'll ask...is it behind (above) the filter I installed? A picture would be great if you are able to direct me to a site that would show me.

Thanks for the responses.

 

When you open it back up you will see the wires and the solenoids.

 

Thanks,
Have you heard of anything like this happen before, seems odd to me but just my luck!

 

SYMPTOM
P0748-PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS

WHEN MONITORED
Continuously with the key ON.

SET CONDITION
This code will set if the voltage detected on the Governor Pressure Solenoid Control circuit at the PCM is different than the expected voltage.

POSSIBLE CAUSES


P1765 DTC present
Intermittent governor pressure solenoid
Transmission relay output
Fused B+ circuit open
Governor pressure solenoid control circuit open
Governor pressure solenoid control circuit open internal
Transmission control relay output circuit open
Governor pressure solenoid control circuit short to ground
Governor pressure solenoid control circuit short to ground internal
Transmission relay output circuit short to ground
Governor pressure solenoid control circuit short to voltage
Governor pressure solenoid control circuit short to solenoid circuits internal
Governor pressure solenoid control circuit short to other circuits
Governor pressure solenoid control circuit short to other circuits internal
Transmission control relay - poor contacts
PCM - governor pressure solenoid control circuit

 

im uploading the diagnosing prosidures right now

 

sorry if these are hard to see, hopefully your moniter is big enough, its the best i can do