U0350Software Incompatibility With Active Grille Air Shutter Module C
- Generic OBD-II code · Network
- Matters for the ITP
- How the car detects it
- Module C denotes one more flap actuator with its own bus address, needed where the front end splits its air openings into more sections, for example left and right lower flaps. U0350 indicates that the engine controller does not accept this unit's software. No manufacturer documents U0350 publicly. Hyundai's 2026 Palisade shows that a module C exists in practice: it drives the lower air flaps with one actuator per side, and its campaign 26-01-026H names U028B, loss of shutter module C, beside U0285 when water corrodes their connectors; which side carries the letter is not stated. GM's 2024 Traverse case shows that a shutter misreporting because of its firmware is replaced rather than reprogrammed (PIT6133). CARB treats grille shutters as active off-cycle technology. U058C is invalid data. The affected flaps stay fixed.
- What you may notice
- Air flap warning message in the cluster
- One group of flaps remains in its last position
- Check engine lamp may light depending on the maker
- Likely causes
- LikelySide or lower flap actuator with another part number or firmware fitted
- PossibleLeft and right actuators swapped or mixed between model versions
- RareEngine controller software expects a different shutter configuration
- Inspection (ITP)
- Can matter for the ITP: it concerns the emissions system.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.