Network, generic

U065D Lost Communication With Air Intake Actuator

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The air intake actuator swings the inlet door between outside air and cabin air. Modern controllers move it on their own: Ford's SSM 51726 notes that the 2021-23 Bronco opens the inlet door to about half every 30 to 60 minutes in recirculation to refresh the cabin, and onsemi's TND416 describes stepper-driven recirculation flaps that find their end stop by stall detection and save compressor energy by reusing cooled air. U065D is set when the climate master hears nothing more from this actuator. No maker documents the code in public. Which way it hurts depends on where the door stopped: stuck in recirculation, humidity builds and the glass fogs; stuck on fresh air, exhaust odour enters in traffic and maximum cooling weakens.

Likely causes

Inlet door actuator electronics failed
Water ingress at the blower housing reaching the actuator plug
LIN or supply wire to the inlet actuator damaged

Symptoms

  • Recirculation button has no effect
  • Windows fog quickly when the door is stuck on recirculation
  • Outside smells enter the cabin when it is stuck on fresh air

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–350
Time0.4–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

air intake actuatorvehicle bus wiring

Related codes

U065EU0658U0164B0173B0175

References: onsemi.com, static.nhtsa.gov, static.nhtsa.gov.