P1810

[Rob89]

I have an 05 Silverado 1500 Z71 off-road 4wd.
I keep getting a p1810 code. The truck shifts good. Just changed the tfp valve. Still getting the code. Has trouble going into 4wd low. No issues going into 4wd high and back into 2wd. Anyone have any info on what may be causing the code?

 

[zora]

Did you replace the internal wire harness, code points to a short circuit.

 

[Rob89]

Did you replace the internal wire harness, code points to a short circuit.

I did not. I take it it's behind the tranny pan?