The code is for a circuit error so this would be a connection problem, but I would replace the solenoid anyway because if the resistance in the solenoid is off it will cause this kind of code as well.
But in case here is a guide to help you check the wiring and I have included the transmission wiring diagrams so you can see which wires to test.
https://www.2carpros.com/articles/how-to-check-wiring
The error code P0756 in a 2004 Honda Accord refers to a fault in the Shift Solenoid "B" Performance/Stuck Off. This code indicates that there is an issue with the transmission's shift solenoid "B" circuit. Check out the images (below). Please let us know what happens.
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Saturday, June 10th, 2023 AT 12:19 PM