What does code U3527 mean?

Q: What does code U3527 mean?

High Voltage System Interlock Circuit G Low. U3527 indicates that the high-voltage interlock loop for circuit G has reported a low voltage condition, meaning the safety circuit that ensures high-voltage connectors are properly seated is not receiving the expected signal. The vehicle's control module detects this as a fault because the interlock circuit voltage has dropped below the manufacturer's specified threshold, which typically triggers a high-voltage system shutdown or prevents activation.

DTC codes / U35xx · Network communication / U3527

U3527High Voltage System Interlock Circuit G Low

U3527 indicates that the high-voltage interlock loop for circuit G has reported a low voltage condition, meaning the safety circuit that ensures high-voltage connectors are properly seated is not receiving the expected signal. The vehicle's control module detects this as a fault because the interlock circuit voltage has dropped below the manufacturer's specified threshold, which typically triggers a high-voltage system shutdown or prevents activation.

SystemNetwork

Code typeGeneric (all makes)

SeverityHigh

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.