U05C1Invalid Data Received From Active Radiator Air Flow Control Module A
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Besides shutters in the visible grille, some cars meter cooling air with flaps placed directly in front of the radiator, behind the bumper intake. Hyundai's patent US11225900B2 describes such an arrangement with two adjacent flaps between bumper opening and radiator plus an air guide steering air towards them. The J2012 list gives this unit its own module family, separate from the grille shutters, and U05C1 means module A delivers position or status frames that the engine or thermal controller rejects. No manufacturer documents U05C1 or its partner U02C0 publicly, so the threshold and lamp strategy are unknown. Because CARB treats active aerodynamic and warm-up devices as off-cycle CO2 technologies, a maker may handle the fault like the shutter codes; in practice the flap is parked open for safe cooling.
- What you may notice
- Warning lamp on some vehicles
- Flap stays open, slightly higher consumption
- Likely causes
- PossibleFlap actuator A electronics faulty
- PossibleConnector behind the bumper wet or corroded
- RareFlap blocked by debris or ice so the actuator reports implausible positions
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.