What does code U3001 mean?

Q: What does code U3001 mean?

Control Module Improper Shutdown Performance. U3001 indicates that a control module did not complete its power-down sequence correctly, so the module's non-volatile memory may not have been saved before power was lost. The computer detected an unexpected loss of ignition voltage or a shutdown handshake failure during the last key-off cycle, and it stores this code to warn that module configuration or adaptive data could be corrupted.

DTC codes / U30xx · Network wiring and bus faults / U3001

U3001Control Module Improper Shutdown Performance

U3001 indicates that a control module did not complete its power-down sequence correctly, so the module's non-volatile memory may not have been saved before power was lost. The computer detected an unexpected loss of ignition voltage or a shutdown handshake failure during the last key-off cycle, and it stores this code to warn that module configuration or adaptive data could be corrupted.

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.

Reading U3001

UNetwork: communication between the vehicle's control modules.

3Generic (SAE) code: it means the same thing on every OBD-II vehicle.

0Network wiring and bus faults.

01The exact fault within that area.

Often seen with

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