Lost Communication With Sunroof Control Module
What it means
U0169 sets when the network loses contact with the sunroof control module. This affects the powered sunroof's operation only; the vehicle drives normally and no drivetrain or safety systems are involved, so it's a comfort-feature fault.
Can I keep driving? Yes — the car is fine to drive; only the sunroof may stop working (possibly stuck in position) and a warning light may appear.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
Common symptoms
What you'll notice
- Sunroof won't open, close, or tilt
- Sunroof control module missing from a scan
- Warning or indicator light for the accessory
- Sometimes a companion communication code
Common causes
Most likely first
- Blown fuse or lost power/ground to the sunroof moduleLikely
- Damaged or corroded wiring/connectorCommon
- CAN bus fault to the moduleCommon
- Failed sunroof control moduleLess often
- Water intrusion into the connector (common near a sunroof)Less often
How to diagnose & fix
Work through it in order
- Scan for other communication codes to check the scope.
- Check the sunroof module's fuse, power, and ground.
- Inspect the connector and wiring for moisture and corrosion — sunroof drains can leak onto them.
- Verify CAN bus continuity to the module.
- If supply and bus are good, suspect the module.
FAQ
Quick answers
Is it safe to drive with U0169?+
Can I just clear U0169?+
Related codes
Read & clear U0169 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.