FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Toyota/Corolla/E210 (2019-2024)/Why is the automatic emergency braking system not working in my 2021 Toyota Corolla E210?

Why is the automatic emergency braking system not working in my 2021 Toyota Corolla E210?

Toyota Corolla E210 (2019-2024)

Severity: criticalDifficulty: medium2-4 hours
3 min read
426 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Diagnose and resolve automatic emergency braking issues in your 2021 Toyota Corolla E210 with this step-by-step guide.

Component
Brakes
Repair Time
2-4 hours

Symptoms

  • •Warning light on the dashboard indicating a problem with the AEB system
  • •Audible alerts or messages on the vehicle's display
  • •The AEB system does not engage when expected

Diagnostic Steps

  1. 1Check for warning lights on the dashboard related to the AEB or pre-collision system
  2. 2Scan for error codes using an OBD-II scanner
  3. 3Inspect the front radar sensor for obstructions or damage
  4. 4Inspect the camera near the rearview mirror for cleanliness and obstructions
  5. 5Check for software updates at a Toyota dealership
  6. 6Inspect wiring and connections with a multimeter
  7. 7Conduct a test drive to verify AEB system engagement

Solution

When the automatic emergency braking (AEB) system in a 2021 Toyota Corolla E210 is not functioning, it can be concerning as this is a critical safety feature. Below are the detailed steps to diagnose and potentially resolve the issue.

Parts/Components That May Need Replacement:

  • Front radar sensor.
  • Windshield-mounted camera.
  • Wiring harnesses or connectors.
  • AEB control module.

Estimated Time for Diagnosis and Repair:

  • Diagnosis: 1-2 hours.
  • Repair (if parts need replacement): 2-4 hours, depending on the complexity and parts availability.

Safety Warnings:

  • Ensure the vehicle is parked on a level surface and the engine is off before performing any inspections.
  • Be cautious when working around the vehicle's electronic systems to avoid static discharge or accidental short circuits.

If the issue persists after these checks, it is advisable to take the vehicle to a certified Toyota service center for further diagnosis and repair, as specialized equipment and expertise may be required.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Multimeter
  • Microfiber cloth

Additional Information

Component

Brakes

Repair Time

2-4 hours

Difficulty

medium

Severity

critical

Tools

3 items

Related Faults

Discover similar issues

  1. What causes a Toyota Corolla E210 to have poor acceleration?

    Poor acceleration in a Toyota Corolla E210 (2019-2024) can be caused by several factors. Below are detailed steps to diagnose and potentially resolve ...

  2. Why does my 2021 Toyota Corolla E210 make a rattling noise from the engine compartment?

    A rattling noise from the engine compartment of your 2021 Toyota Corolla E210 can be concerning. This noise can be caused by several issues, ranging f...

  3. How do I fix intermittent stalling in my 2023 Toyota Corolla?

    Intermittent stalling in a 2023 Toyota Corolla E210 can be caused by several issues, ranging from fuel system problems to electronic control system ma...

  4. Why is my 2024 Toyota Corolla E210 making a rattling noise at high speeds?

    A rattling noise in your 2024 Toyota Corolla E210 at high speeds can be concerning and may be due to several potential causes. Here's a detailed guide...

  5. Why is my Toyota Corolla E210 making a rattling noise while idling?

    A rattling noise while idling in a Toyota Corolla E210 (2019-2024) can be caused by several issues. Here's a detailed guide to diagnose and potentiall...

  6. What are the causes of a Toyota Corolla E210's engine misfiring?

    Engine misfiring in a Toyota Corolla E210 (2019-2024) can be caused by several issues. Here’s a detailed breakdown of potential causes, diagnostic ste...

Share this solution

Comments

Sign in to share your thoughts

Sign In
J
jordanhernandez830Nov 28, 2025, 07:08 PM

Check if there's any dirt or obstructions on the sensors, as that can affect their performance. Also, make sure the system is activated in the settings; sometimes it can be turned off accidentally. If everything looks good, it might be worth having a dealer run a diagnostic.

Back to Generation