What does code U0493 mean?

Q: What does code U0493 mean?

Invalid Data Received From Personal Computer. U0493 is a communication fault indicating that a control module received invalid or corrupted data from the personal computer (PC) module over the vehicle's network. The computer detected that the data frames from the PC module failed validation checks, such as incorrect message length, out-of-range values, or missing expected parameters, so it flagged the signal as invalid rather than trusting it.

DTC codes / U04xx · Invalid data received from a module / U0493

U0493Invalid Data Received From Personal Computer

U0493 is a communication fault indicating that a control module received invalid or corrupted data from the personal computer (PC) module over the vehicle's network. The computer detected that the data frames from the PC module failed validation checks, such as incorrect message length, out-of-range values, or missing expected parameters, so it flagged the signal as invalid 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.