What does code U04BA mean?

Q: What does code U04BA mean?

Invalid Data Received From Switch Input Module A. U04BA is a communication fault where a control module on the vehicle's network receives data from Switch Input Module A that it considers invalid or out of range. The module monitoring the network has detected that the switch input module is reporting a signal that does not match expected values, so it flags the data as unreliable rather than trusting it.

DTC codes / U04xx · Invalid data received from a module / U04BA

U04BAInvalid Data Received From Switch Input Module A

U04BA is a communication fault where a control module on the vehicle's network receives data from Switch Input Module A that it considers invalid or out of range. The module monitoring the network has detected that the switch input module is reporting a signal that does not match expected values, so it flags the data as unreliable rather than trusting it.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaInvalid data received from a module

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