U0350 code meaning
Software Incompatibility With Active Grille Air Shutter Module C
What U0350 means
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.
U0350 at a glance
- Check engine lightUsually not
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0350
- 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
Common causes of U0350
- Most likelySide or lower flap actuator with another part number or firmware fitted
- PossibleLeft and right actuators swapped or mixed between model versions
- Less likelyEngine controller software expects a different shutter configuration
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Active grille shutter module c
What each part of U0350 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 50 | The exact fault in that area. |
What to do next
- Note U0350 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0350
What does U0350 mean?
U0350 means "Software Incompatibility With Active Grille Air Shutter Module C". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U0350?
U0350 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0350 fail an emissions test?
Yes, it can. U0350 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0350 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U0350 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.