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U02C0 Lost Communication With Active Radiator Air Flow Control Module A

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

J2012 gives the active radiator air flow module its own codes, separate from the active grille shutter modules U0284 and U0285. A Hyundai patent shows the kind of hardware meant: a pair of flaps between bumper intake and radiator, fed by an air guide, whose opening meters the cooling air. U02C0 means module A of such a system has stopped answering the engine or thermal controller. No manufacturer documents U02C0 publicly. Closely related shutter cases show how makers treat the loss: the 2026 Ram 1500 lights the MIL with U0285 for its lower shutter (STAR S2523000095), and Subaru traced U0284 on the 2017-2019 Impreza to water and corrosion at connector B63 (bulletin 07-140-18). Expect a warning lamp and flaps held in a safe position.

Likely causes

Water ingress and corrosion at the front-end connector or harness
Flap unit or wiring damaged by stones or a minor collision
Actuator electronics of module A failed

Symptoms

  • Check engine light or warning lamp
  • Cooling flaps no longer move, slightly higher consumption

Repair estimate

DifficultyMediumDIY possible
Parts and labour€60–600
Time0.5–2.5 h

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

Parts involved

active radiator airflow module avehicle bus wiring

Related codes

U05C1U0284U0285P05AE

References: patents.google.com, static.nhtsa.gov, static.nhtsa.gov, law.cornell.edu.