When your 2020 Hyundai Palisade's parking collision warning indicator is always on—regardless of what's actually around the vehicle—the system is stuck in alert mode. This constant warning defeats the purpose of the feature and indicates a fault.
Warning Always On: What It Means
A parking collision warning that never turns off indicates: one or more sensors continuously detecting something (faulty sensor), the display or warning logic stuck in alert state, a system not resetting after triggering, or persistent interference/blockage at a sensor location.
Sensor vs. Display Issue
The constant warning could be the sensors correctly reporting what they "see" (faulty sensor reading phantom objects) or the warning system failing to clear even when sensors report clear (display/logic issue). Both cause the same symptom but different repairs.
Common Palisade-Specific Concerns
The large Palisade has sensors at multiple positions. Common issues include: sensors detecting the body's own tow hitch or bumper steps, aftermarket accessories entering sensor range, contamination from the vehicle's size collecting more road debris, or water intrusion in the sensor housings.
Diagnostic Steps
Clean all sensors thoroughly. Remove any aftermarket accessories that might be in sensor range. Check if the warning correlates with a specific zone on the display. Try resetting by turning the system off and on. Note if the warning ever clears, even briefly.
Resolution
Removing sensor obstructions. Faulty sensor replacement. System reset or recalibration. Display or control module service if the logic is stuck. Proper configuration for installed accessories like hitches.