What does code U3015 mean?

Q: What does code U3015 mean?

Control Module Ground C. U3015 indicates that a control module has detected a fault on its dedicated ground circuit, designated as Control Module Ground C. The module monitors the voltage drop or continuity on this ground path and sets the code when the ground reference is missing, intermittent, or higher resistance than expected.

DTC codes / U30xx · Network wiring and bus faults / U3015

U3015Control Module Ground C

U3015 indicates that a control module has detected a fault on its dedicated ground circuit, designated as Control Module Ground C. The module monitors the voltage drop or continuity on this ground path and sets the code when the ground reference is missing, intermittent, or higher resistance than expected.

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.