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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Active Air Flap-Left Diagnosis (HEV) >> DTC U0164: Lost Communication With HVAC Control Module >> DTC Inspection >> Monitor GDS Data

Monitor GDS Data

  1. Engine "ON".
  2. Warm up the engine until the temperature reaches up to normal at EV mode with engine start status.
  3. Using GDS, check if there is an error in FATC system.

    If there is an error in FATC system, first do a troubleshooting for those system and then check A.A.F system.

  4. Is the same DTC displayed again?

    YES 

    NO 

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