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Hello, my name is***** and thanks for your question.
What I usually see as the most common issue for these not running in hybrid mode is an issue with the air conditioning. The air conditioning needs to be fully functional for the system to switch to hybrid mode. The system uses the air conditioning to help cool the battery back through the rear evaporator. If the air conditioning is slightly low on freon the pressure could intermittently fall out of acceptable range causing hybrid drive inhibit. That is the most common issue I see for this symptom, other than that the PCM and BCM modules would need to be scanned for faults and depending on what code(s) are stored would determine the next step in diagnosis.
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Sorry, I am not a part of the phone call program. You might want to double check the A/C refrigerant charge and make sure the A/C system is operating correctly.
Is the air conditioning functioning normally?
Ok thanks. At this point I would need to know if there are any codes stored in the powertrain control module or the battery control module. There are no other common issues for this symptom other than the A/C.