Home >> Jaguar >> 2018 >> E-Pace Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> General Information - Diagnostic Trouble Code (DTC) Index (HUD - Pcm) -- E-Pace/X540 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: HVAC Control Module (HVAC) (G2164094) >> DTC B1D34-66: Heater In Lock Out Mode - Signal has too many transitions/events >> Possible Causes