What does code P1751 mean?

Q: What does code P1751 mean?

Power Supply Voltage High. P1751 on Volkswagen vehicles means the transmission control module (TCM) has detected that its power supply voltage has risen above the expected operating range, typically above 16 volts. The TCM monitors the voltage feed from the vehicle's electrical system and sets this code when the supply exceeds a calibrated threshold, which can disrupt shift solenoid and pressure control operation.

DTC codes / Volkswagen codes / P1751

P1751 · VolkswagenPower Supply Voltage High

P1751 on Volkswagen vehicles means the transmission control module (TCM) has detected that its power supply voltage has risen above the expected operating range, typically above 16 volts. The TCM monitors the voltage feed from the vehicle's electrical system and sets this code when the supply exceeds a calibrated threshold, which can disrupt shift solenoid and pressure control operation.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.