The 2021 Subaru Forester displays camera obstruction warnings when EyeSight's stereo cameras can't see clearly. This protective warning prevents the system from making decisions based on compromised vision. Understanding obstruction causes helps restore EyeSight function.
What Constitutes Obstruction
EyeSight considers many conditions as obstruction. Exterior windshield contamination—dirt, bugs, salt spray—blocks camera view. Interior windshield film from outgassing or cleaning residue reduces clarity. Condensation (fogging) on either surface obscures cameras. Even dashboard reflections can interfere with camera function.
Cleaning for EyeSight
Effective cleaning for EyeSight requires attention to both windshield surfaces in the camera area. Use automotive glass cleaner and clean microfiber cloth. Clean both exterior and interior surfaces. Avoid leaving streaks or residue. Ensure the area is completely clear and dry.
Common Obstruction Scenarios
Several scenarios commonly trigger obstruction warnings. Morning condensation on cold windshield clears with defrost. Road spray in wet conditions may persist until you can clean the exterior. Interior fogging from temperature changes clears with climate control. Persistent film from interior cleaning products requires thorough re-cleaning.
Persistent Obstruction Warnings
If obstruction warnings persist after thorough cleaning in clear conditions, the cameras themselves may have issues. Internal contamination, lens damage, or misalignment can cause constant obstruction warnings even with clean windshield.