U0302

Software Incompatibility With Transmission Control Module

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

~$56 (est.)

Symptoms

Incorrect operation of the gearbox
The Check Engine light comes on
Reduced engine power
Transmission transition to emergency mode
Gear shifting problems

Causes

Incompatible software versions in the ECU and TCM
Incorrect programming of modules after replacement
Data corruption in the memory of one of the modules
Problems with the CAN bus
Software update errors

How to Fix

Check software versions in ECU and TCM
Update software to compatible versions
Check the status of the CAN bus and connections between modules
Reflash modules if necessary
Conduct module memory diagnostics for errors

Related codes

U0300 U0301 U0303