What does code U3504 mean?

Q: What does code U3504 mean?

Control Module Input Power B Circuit Range/Performance. U3504 is a generic body/network code indicating that a control module has detected an out-of-range or performance problem with the power supply circuit feeding its own internal logic or a shared module power bus. The module monitors voltage on its input power circuit and sets this code when the voltage is outside the expected operating window for a calibrated period, which can be caused by a weak battery, poor connection, or a failing module.

DTC codes / U35xx · Network communication / U3504

U3504Control Module Input Power B Circuit Range/Performance

U3504 is a generic body/network code indicating that a control module has detected an out-of-range or performance problem with the power supply circuit feeding its own internal logic or a shared module power bus. The module monitors voltage on its input power circuit and sets this code when the voltage is outside the expected operating window for a calibrated period, which can be caused by a weak battery, poor connection, or a failing module.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaNetwork communication

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