What does code U3029 mean?

Q: What does code U3029 mean?

Control Module A Disable Feedback Circuit Low. U3029 indicates that a control module (Module A) has commanded a disable or shutdown function, but the feedback circuit monitoring that command is reporting a low voltage condition. The computer expects to see a specific voltage on the feedback line when the disable is active, and a low reading tells it the circuit is shorted to ground, open, or the module is not responding as commanded.

DTC codes / U30xx · Network wiring and bus faults / U3029

U3029Control Module A Disable Feedback Circuit Low

U3029 indicates that a control module (Module A) has commanded a disable or shutdown function, but the feedback circuit monitoring that command is reporting a low voltage condition. The computer expects to see a specific voltage on the feedback line when the disable is active, and a low reading tells it the circuit is shorted to ground, open, or the module is not responding as commanded.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.