2024 Guide: Fix ‘Pre Collision Assist Not Available Sensor Blocked’ Error in 5 Easy Steps

Navigating today’s advanced vehicular technology can sometimes be challenging, especially when encountering error messages like ‘Pre Collision Assist Not Available Sensor Blocked’. As someone who’s had firsthand experience tackling this issue, I can confidently guide you through the process. This article will walk you through five easy steps to resolve this error and ensure your vehicle’s safety systems are functioning correctly. Let’s dive in!

Understanding the Pre Collision Assist Feature

Before we get into the steps to fix the sensor issue, it’s vital to understand what the Pre Collision Assist feature is. Pre Collision Assist is a modern safety feature designed to help drivers avoid or lessen the severity of collisions. Utilizing various sensors and cameras, this system detects potential obstacles in front of the vehicle and can even apply brakes automatically if necessary.

Why does the error occur?

Blocked Sensor: The most common cause of the ‘Pre Collision Assist Not Available Sensor Blocked’ error is a blocked or obscured sensor.

Weather Conditions: Adverse weather conditions like snow, rain, or fog can temporarily block sensors.

Dirt or Debris: Accumulation of dirt, mud, or grime can interfere with sensor functionality.

Software Glitches: Sometimes, software updates or glitches can cause such errors.

Now that we understand what we’re dealing with, let’s move on to the practical steps to solve this error.

Step 1: Locate Your Vehicle’s Sensors

The first step in troubleshooting this error is to locate your vehicle’s sensors. Most modern cars have multiple sensors positioned strategically on the vehicle.

Types of Sensors:

Front Bumper Sensors: Typically located near the grill or lower in the bumper.

Windshield Cameras: Used for lane-keeping assist and detecting objects.

Side and Rear Sensors: These are often used for blind spot detection and parking assistance.

Pro Tip: Refer to your vehicle’s owner manual to identify the exact location of these sensors.

Step 2: Clean the Sensors

Once you’ve identified the sensor locations, the next step is to clean them thoroughly. Cleaning the sensors is straightforward but requires a careful approach to avoid any damage.

Materials Needed:

Microfiber cloth

Mild detergent and water

Compressed air (optional)

Cleaning Process:

Turn off the Vehicle: Always turn off your vehicle before attempting to clean the sensors.

Use a Microfiber Cloth: Gently wipe the sensors with a microfiber cloth dampened with a mixture of mild detergent and water.

Use Compressed Air: For hard-to-reach sensors or cameras, use compressed air to blow away dust and debris.

Important: Avoid using harsh chemicals or abrasive materials as they can damage the sensors.

Step 3: Inspect for Physical Damage

After cleaning, inspect the sensors for any physical damage. It’s not uncommon for sensors to get damaged due to impacts from road debris, minor fender-benders, or even heavy car washes.

Inspection Tips:

Check for Cracks or Chips: Even a small crack can hinder sensor functionality.

Look for Misalignment: Ensure that the sensors are properly aligned and not dangling or loosely attached.

Secure Connections: Make sure the wiring harnesses connected to the sensors are secure and intact.

Step 4: Perform a System Reset

If cleaning and inspection don’t resolve the issue, the next step is to perform a system reset. This can often clear any temporary glitches or software-related issues that may be causing the error.

Reset Process:

Turn Off the Vehicle: Ensure the vehicle is completely turned off.

Disconnect the Battery: Use a wrench to disconnect the negative terminal of the car battery.

Wait for 10-15 Minutes: This time allows the vehicle’s systems to fully reset.

Reconnect the Battery: Reconnect the negative terminal and start the vehicle.

Note: After reconnecting the battery, you may need to reprogram your radio stations and clock as these may reset.

Step 5: Seek Professional Help

If you’ve followed all the above steps and the error still persists, it’s time to seek professional help. This ensures that any deeper issues, such as software malfunctions or internal sensor problems, are diagnosed and fixed by a professional.

When to Visit a Professional:

If the error code reappears immediately after a reset.

If there is noticeable damage to any sensors.

If you’re not comfortable performing any of the previous steps yourself.

Choosing a Professional:

Look for certified technicians with experience in your vehicle make and model.

Read reviews and ask for recommendations.

Don’t hesitate to inquire about the diagnostic process and pricing upfront.

Maintenance Tips to Avoid Future Sensor Issues

Now that you’ve resolved the error, it’s essential to follow some maintenance tips to avoid future sensor issues.

Regular Cleaning:

Regularly clean your vehicle, paying close attention to keeping the sensors free of dirt and debris.

Check During Weather Changes:

During adverse weather conditions, routinely check the sensors to ensure they’re not blocked by snow, ice, or mud.

Schedule Routine Inspections:

Incorporate sensor inspection into your regular vehicle maintenance routine.

Following these steps and tips will help ensure that your Pre Collision Assist feature remains fully operational, offering you the safety and peace of mind every driver needs.

Frequently Asked Questions (FAQs)

1. What causes the ‘Pre Collision Assist Not Available Sensor Blocked’ error?

The error is usually caused by one of three factors: a physically blocked sensor (by dirt, debris, or snow), damage to the sensor, or a software glitch that needs correcting.

2. Can I drive my vehicle if the Pre Collision Assist feature is not available?

While you can drive your vehicle if the Pre Collision Assist feature is unavailable, it’s not recommended because you lose access to a crucial safety feature that helps prevent collisions.

3. Do I always need to visit a dealership to fix this issue?

Not necessarily. Many times, cleaning the sensors and performing a system reset can resolve the issue. However, if these steps do not work, seeking professional help from a dealership or certified technician is advisable.

4. How often should I clean my vehicle’s sensors?

It’s a good practice to clean your vehicle’s sensors every few months or more frequently if you drive in harsh weather conditions or off-road terrains. Regular cleaning helps maintain the sensors’ effectiveness and prolongs their lifespan.