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Your 2009 Honda Pilot is equipped with a feature that will deactivate the Variable Torque Management 4WD System (VTM4) if there are any issues with the engine. When the check engine light and VTM4 indicator are illuminated, it generally indicates an engine problem. To address this, you should address any engine faults first, which will typically allow the VTM4 system to resume normal operation. The initial step for you, your mechanic, or dealership is to use an OBD-II scanner to retrieve the engine codes. These codes will provide insight into the cause of the persistent check engine light. Major auto parts retailers such as Advance Auto Parts and Autozone offer complimentary code scanning services. A common issue that triggers the Honda's check engine light is a malfunctioning O2 sensor.
The typical reasons for the VTM 4 and check engine lights to illuminate in a 2009 Honda Pilot are related to issues with the transmission or transfer case.