What does code U0402 mean?

Q: What does code U0402 mean?

Invalid Data Received From Transmission Control Module. U0402 means the transmission control module (TCM) is sending data over the vehicle's communication network that other modules consider invalid or implausible. The computer that set the code received a message from the TCM, but the message content failed a rationality or range check, so the receiving module flagged it as untrustworthy.

DTC codes / U04xx · Invalid data received from a module / U0402

U0402Invalid Data Received From Transmission Control Module

U0402 means the transmission control module (TCM) is sending data over the vehicle's communication network that other modules consider invalid or implausible. The computer that set the code received a message from the TCM, but the message content failed a rationality or range check, so the receiving module flagged it as untrustworthy.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.