What does code U3502 mean?

Q: What does code U3502 mean?

Control Module Input Power A Circuit High. U3502 is a generic network code indicating that a control module has detected an abnormally high voltage on its primary power input circuit, typically the main feed from the battery or power distribution center. The module's internal monitoring circuit compares the actual voltage on that input against an expected range and sets the code when the voltage exceeds the upper threshold, which can be caused by a charging system fault, a wiring problem, or an internal module issue.

DTC codes / U35xx · Network communication / U3502

U3502Control Module Input Power A Circuit High

U3502 is a generic network code indicating that a control module has detected an abnormally high voltage on its primary power input circuit, typically the main feed from the battery or power distribution center. The module's internal monitoring circuit compares the actual voltage on that input against an expected range and sets the code when the voltage exceeds the upper threshold, which can be caused by a charging system fault, a wiring problem, or an internal module issue.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.