Powertrain, generic · Vehicle speed, idle control and auxiliary inputs

P05FE Active Grille Air Shutter C Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

Active grille shutters close the air inlet when little cooling is needed, to reduce drag and speed up warm-up. P05FE is the performance check of a third shutter C – target and actual position do not match, as P059F does for shutter A and P05AE for shutter B. Only vehicles with three separately driven shutters could set it, and no manufacturer was found that uses a shutter C: GM and Ford use only A (upper) and B (lower). This description therefore follows A and B: control is suspended and the shutter stays where it is or opens; if it sticks closed, cooling air is missing under load. GM and Ford light the lamp for A and B after two trips. Ice and debris are frequent causes, and GM fixed false A/B codes in snow by software on the 2025 Equinox. Stuck on is P2C73.

Likely causes

Debris or ice blocking the louvres
Louvres unhooked or broken (impact)
Shutter C actuator faulty
Connector, wiring or supply corroded
Software false trigger in frost

Symptoms

  • Check engine light (depending on the maker)
  • Higher coolant temperature under load or slower warm-up
  • Slightly higher fuel consumption
  • Often no noticeable symptoms

Repair estimate

DifficultyMediumDIY possible
Parts and labour€80–600
Time0.5–2.5 h

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

Parts involved

active grille shuttershutter actuatorengine control module

Related codes

P2C73P2C74P2C75P059FP05AE

References: law.cornell.edu, fordservicecontent.com, gm-techlink.com, static.nhtsa.gov.