P2C77Active Grille Air Shutter D Control Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2C77 flags the drive circuit of a fourth grille shutter D as implausible: the actuator does not respond to its command in the expected way, or the signal it returns lies outside the permitted window. No manufacturer publishes a shutter D, so the code is reserved for designs with four separately powered flaps. Comparable faults on other flaps show where to look. VW's 2015–16 Jetta (1.8 T and 2.0 TDI) set P05A3 for shutter A, often together with P05A0, because the software inside the grille motor was faulty; an updated motor cured it. Hyundai's 2026 Palisade sets P2C74 for shutter C when water corrodes the bumper connectors. So wiring, connectors and the actuator itself come before any module. Driving is normally unaffected beyond the warning lamp; the flap simply stays where it stopped.
- What you may notice
- Engine warning lamp
- Shutter D no longer follows commands
- Likely causes
- LikelyCorroded connector or damaged wiring to the actuator of shutter D
- PossibleActuator of shutter D faulty, including faulty internal software
- RareStiff or partly blocked flap slowing the actuator response
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.