What is the reason for the Patrol still displaying a warning after the windshield washer fluid is full?
2 Answers
The reasons for the Patrol still displaying a warning after the windshield washer fluid is full are: 1. Damage to the washer fluid reservoir; 2. Faulty liquid level sensor. Performance of automotive windshield washer fluid: 1. Cleaning: It has wetting and penetrating functions, playing a role in cleaning and removing dirt; 2. Antifreeze: It can significantly lower the freezing point of the liquid, serving an antifreeze purpose; 3. Anti-fogging: A single-molecule protective layer forms on the glass surface, preventing the formation of fog droplets, ensuring the windshield remains clear and transparent with a clear field of vision. Taking the 2018 Patrol as an example, its body dimensions are: length 5165mm, width 1995mm, height 1955mm, wheelbase 3075mm, and minimum ground clearance 273mm.
I've been driving a Patrol for many years and have encountered the issue of the windshield washer fluid warning light staying on even when the reservoir is full a few times, usually due to a sensor problem. At the bottom of the car's windshield washer fluid tank, there's a small float sensor specifically designed to detect the water level; mineral deposits or hard water can easily cause it to get stuck, making it falsely indicate an empty tank. The sensor in Patrol models is relatively inexpensive, but its location is quite hidden—you can't even reach it without removing the front bumper. Additionally, moisture or aging in the electrical connectors can also trigger signal malfunctions. I recommend trying to pour some vinegar to soak and soften the mineral deposits first. If the issue persists, you'll need to check the fuse or wiring. If all else fails, replacing the sensor at a dealership won't cost much, but don't overlook driving safety—such false alarms could be troublesome if they lead to misjudgment when the tank is actually empty. When adding washer fluid, always use purified water to minimize sediment buildup.
