U0351Software Incompatibility With Active Grille Air Shutter Module D
- Generic OBD-II code · Network
- Matters for the ITP
- How the car detects it
- Shutter module D is the fourth address the code list reserves for grille flap actuators and is relevant only where a front end has four independently driven flap groups. U0351 signals that the engine controller will not accept the software of that unit. No manufacturer documents U0351 or says where a unit D would sit, so the position is maker-specific. What is documented around it: Hyundai already splits the lower flaps of the 2026 Palisade into left and right actuators and stores codes for modules B and C when water reaches their plugs (26-01-026H), GM swaps shutters whose firmware misreports instead of reflashing them (PIT6133), and CARB requires the active time of such off-cycle features to be logged. Part number and software level of the fitted actuator should be checked first. U028C is lost contact, U058D invalid data.
- What you may notice
- One flap group no longer opens or closes
- Air flap warning or check engine lamp depending on the maker
- No noticeable change in driving
- Likely causes
- LikelyFlap actuator of group D with another part number or firmware fitted
- PossibleFront end or bumper from another version fitted with different shutter equipment
- RareEngine controller calibration expects a different number of shutter modules
- 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.