What does code U04BC mean?

Q: What does code U04BC mean?

Invalid Data Received From Switch Input Module C. U04BC means a control module on the vehicle's network received data from the Switch Input Module C that it judged invalid or implausible, so it flagged the message as untrustworthy. The code is stored when the module's reported switch states fail the receiving module's validity checks, such as out-of-range values, missing expected bits, or a message that contradicts other inputs.

DTC codes / U04xx · Invalid data received from a module / U04BC

U04BCInvalid Data Received From Switch Input Module C

U04BC means a control module on the vehicle's network received data from the Switch Input Module C that it judged invalid or implausible, so it flagged the message as untrustworthy. The code is stored when the module's reported switch states fail the receiving module's validity checks, such as out-of-range values, missing expected bits, or a message that contradicts other inputs.

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.