Pre Collision Assist Not Available – Possible Causes and Meaning

Muhammad Furqan

Pre Collision Assist Not Available

The car technology keeps getting better and more complicated as time goes on. There are also proximity sensors, which use radar to find people, objects, and other cars nearby.

In this piece, I’ll talk about pre-collision assist and explain what it means when you get an error message saying that pre-collision assist isn’t working.

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As cars get closer to being able to drive themselves completely, more and more features are being added to help this next step in the growth of cars and make them safer at the same time.

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For a vehicle to be fully self-driving, it will need to be able to assess its surroundings and act accordingly.

Modern cars have sensors and cameras that send information to the computer. The computer then takes action, like putting on the brakes or avoiding an object, if it thinks something bad might happen.

What is Pre-Collision Assist?

Pre-collision assist helps you avoid crashes, as the word suggests. It’s a system that uses cameras and sensors to figure out what’s going on around you and take the right steps.

One way it reacts is by immediately turning on the ABS to make the brakes work better or, in some cases, by taking evasive action by applying the brakes or turning the wheel to the left or right.

Its main purpose is to help you avoid a crash by making the brakes and turning more sensitive. If you don’t act quickly enough, the escape manoeuvre will happen on its own.

In addition to identifying other vehicles or objects nearby, the system also looks for pedestrians within a certain radius. When there is a chance of a crash, the device will sound an alarm and make the brakes more sensitive to get ready.

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Pre Collision Assist Not Available Meaning

This just means that the Pre Collision Assist is not working. There are a few things that could be wrong with your Ford’s pre-collision assist.

  • Sensor Blockage: Snow and Ice, Dirt and Debris.
  • Environmental Conditions: Heavy Rain, Fog and Mist.
  • Technical Issues: Wiring Problems, Software Glitches, Battery Voltage, Collision Damage.

Most of these happen because the camera or sensor is broken. When one or more of your cams or sensors are broken, pre-collision assist won’t work, and you’ll get a message saying “pre-collision assist not available” on your dashboard.

Snow, ice, sand, dirt, grime, debris, salt, or something else that gets in the way of the sensors is another thing that can make them stop working, but you might not have to change a part.

During the winter, this happens a lot of the time. Especially ice and salt from the roads can mess up the sensors and make them not work right. The pre-collision error warning shows up when this happens.

Diagnosing Pre Collision Assist Issues

Warning Lights and Alerts

Dashboard Notifications

Pre Collision Assist is equipped with a range of warning lights and dashboard notifications. These alerts signal potential issues with the system and should not be disregarded. Drivers should promptly investigate the source of the alert.

Audible Alarms

In addition to visual alerts, some systems use audible alarms to notify drivers of potential problems. These alarms are designed to capture the driver’s attention and should be taken seriously.

Troubleshooting Steps

Checking Sensor Cleanliness

Many sensor malfunctions are a result of dirt or debris buildup. Regularly cleaning the sensors can help maintain their functionality.

Software Updates

Manufacturers often release software updates to improve the performance of Pre Collision Assist. Staying up-to-date with these updates is essential for optimal system functionality.

Consulting the Owner’s Manual

When faced with issues, consulting the vehicle’s owner’s manual can provide valuable guidance on troubleshooting steps and system maintenance.

How Do I Fix Pre-Collision Assist Not Working?

The first thing you should do is just clean your car. When there is a lot of snow or ice, it is safe to say that this is the main cause of the problem.

Most of the time, the problem can be fixed by taking your car to a car wash. But sometimes, you might have to do it twice before pre-collision help works again.

You could also try to clean the cameras and sensors by hand by going to where they are. In the worst case, you will have to buy a new sensor or new cams. This doesn’t happen very often, though.

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At What Speed is Pre Collision Assist Activated?

At 3 mph, pre-collision help is turned on. This is pretty much when the car starts to move. Features like crosswalk assist don’t work until the car is going about 50 mph. You still need to be careful, though, because it won’t work in all situations.

Tips for Drivers

Staying Informed

To make the most of Pre Collision Assist, drivers should stay informed:

Vehicle Manual

Review your vehicle’s manual to understand the specifics of your Pre Collision Assist system. Familiarize yourself with it to maximize your understanding of this safety feature.

Vehicle Service Center

Regularly visit a certified service center for maintenance and software updates to ensure your system functions optimally. Professional technicians can conduct thorough checks of your PCA system, ensuring it operates at peak efficiency.

Defensive Driving Practices

Incorporate defensive driving practices into your daily routine:

Maintaining a Safe Following Distance

Maintain a safe distance from the vehicle in front of you to provide enough time for the system to react in case of emergencies.

Being Alert in Adverse Conditions

In adverse weather conditions, such as rain, fog, or snow, exercise heightened vigilance. Pre Collision Assist may be less effective in these conditions, so it’s crucial to drive cautiously and adapt your speed accordingly.

Final Thoughts

In summary, Pre Collision Assist is a revolutionary safety feature that leverages advanced sensor technology and real-time data processing to prevent accidents and reduce their severity. It’s a vital component of modern vehicle safety systems.

Pre Collision Assist epitomizes the role of technology in enhancing vehicle safety. While it’s a powerful tool, responsible driving remains essential. The synergy of technology and human vigilance creates safer roads for all.


What does pre collision assist not available mean?

There is no Pre-Collision Assist Blocked sensor. The sensors need cleaning. Wipe the sensors down. If the message keeps showing up, get your car checked as soon as you can.

Why is my collision warning not available?

The radar for the impact warning system can’t see because of bad weather or ice, mud, or water in front of the radar. Usually, the sensor can be cleaned by the driver. As soon as possible, get in touch with an authorised dealer. The method that warns of a possible crash isn’t working right.

Why is my pre collision system not working?

A broken or inaccurate laser sensor or a broken brake switch are two common things that can go wrong with this system. Also, aftermarket controls for the trailer brakes can mess with how the Pre-collision system works.

Why is my collision warning light on?

When you’re getting too close to a car in front of you and could crash in a few seconds, the system will flash a red “Collision Alert” on the bottom of the windscreen and make eight high-pitched front beeps.

How often should I check my vehicle’s sensors?

It’s advisable to perform a monthly inspection of your vehicle’s sensors for cleanliness and functionality. Regular checks help ensure the system’s reliability.

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