Reduced or No HVAC Heat Output. I12 & F30 PHEV - The heat is not functioning during electric driving and/or the heat output is reduced or fluctuating when driving with the combustion engine. I01 - The heat is not functioning at all. The issue can occur sporadically for all vehicles and will not have any associated fault codes. IHKA software with I-Level: I01, I12I001-15-11-504 F30 PHEV F020-15-11-505
