What does code U3016 mean?

Q: What does code U3016 mean?

Control Module Ground D. U3016 indicates that a control module has detected a fault on its dedicated ground circuit, designated as Ground D within the vehicle's network architecture. The module monitors the voltage drop across its ground path and sets this code when the ground reference is missing, intermittent, or has excessive resistance, which can corrupt sensor readings and disrupt communication.

DTC codes / U30xx · Network wiring and bus faults / U3016

U3016Control Module Ground D

U3016 indicates that a control module has detected a fault on its dedicated ground circuit, designated as Ground D within the vehicle's network architecture. The module monitors the voltage drop across its ground path and sets this code when the ground reference is missing, intermittent, or has excessive resistance, which can corrupt sensor readings and disrupt communication.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaNetwork wiring and bus faults

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