What is VTM-4

Hello, VTM-4 stands for "Variable Torque Management" related to the Super Handling All Wheel Drive SH-AWD system your MDX has. The warning light can come on in relation to a failure that causes the check engine light to also come on. Focus on diagnostic testing for the check engine light; repairing a common failure will likely resolve both lights. This could be engine management related, ignition or fuel related; hard to know until testing is completed.