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DTC codes / U03xx · Software and configuration mismatches / U031A

U031ASoftware Incompatibility With Transmission Range Control Module

This code means the transmission control module (TCM) has detected a software incompatibility with the transmission range control module, which is the component that tells the computer which gear or range the transmission is in. The TCM compares software versions or calibration data between the two modules and sets U031A when they do not match or cannot communicate properly.

SystemNetwork
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyProfessional
AreaSoftware and configuration mismatches

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

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