Audi P1750 Power Supply Low Voltage: Causes and Fixes for Tiptronic Gear Indicator Failure

I'm experiencing an Audi transmission fault code P1750 indicating a low power supply voltage. This issue occurs only in Tiptronic mode, where the vehicle no longer displays the current gear, making it difficult to know which gear I'm in. The code appears intermittently — I can clear it while driving, and the system functions normally until I turn off the car, after which the P1750 code returns. This behavior suggests a potential issue with the power supply to the transmission control module or a wiring fault. Anyone who has encountered this specific Audi P1750 error or knows how to diagnose it? Any suggestions on possible causes or fixes would be greatly appreciated.