If you suspect that your headlight sensor is bad, there are a few easy ways to tell. First, check the dashboard light for an indication of low visibility or incorrect readings. If the light is on and not indicating any issues, then something else may be causing it. You can also look at the headlights themselves; if they seem dimmer than usual or aren’t illuminating properly, this could be a sign of a faulty sensor. Finally, if none of these tests yield any insight into the issue, take your car in for professional inspection and diagnosis as soon as possible – especially if you’re driving in conditions where proper headlight illumination is essential for safety! A good mechanic should be able to determine whether your headlight sensor is bad and recommend an appropriate course of action from there.