FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
How do I fix the key fob not working issue in a 2021 Toyota Camry? - Toyota Camry
Home/Cars/Toyota/Camry/Eighth Generation (2018-present)/How do I fix the key fob not working issue in a 2021 Toyota Camry?

How do I fix the key fob not working issue in a 2021 Toyota Camry?

Toyota Camry Eighth Generation (2018-present)

Error Codes
1 hour
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
610 words

Problem Statement

Learn how to troubleshoot and fix the key fob not working issue in your 2021 Toyota Camry with step-by-step instructions.

Affected Component
key fob
Estimated Time
1 hour

Symptoms

  • •Key Fob Not Unlocking/Locking Doors
  • •No Response from Engine Start
  • •Warning Lights
  • •Intermittent Functionality

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

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

  • •Flathead Screwdriver
  • •CR2032 Battery
  • •Multimeter
  • •OBD-II Scanner
  • •Owner’s Manual

Additional Information

Affected Component
key fob
Estimated Time
1 hour
Difficulty
medium
Severity
medium
Tools Required
5 items

Related Faults

Loading...

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation

Fixing Key Fob Not Working Issue in a 2021 Toyota Camry

Tools Required
  • Flathead Screwdriver: For prying open the key fob.
  • CR2032 Battery: Replacement battery for the key fob.
  • Multimeter: To test battery voltage.
  • OBD-II Scanner: Optional, for reading any relevant error codes.
  • Owner’s Manual: For reference on reprogramming the key fob.
Repair Instructions
Step 1: Inspect the Key Fob
  • Examine for Damage: Look for cracks, broken buttons, or signs of water damage.
  • Check Key Fob Case: Ensure the case snaps together properly without gaps.
Step 2: Replace the Battery
  1. Open the Key Fob: Use a flathead screwdriver to gently pry apart the key fob case. Be cautious not to damage the internal components.
  2. Remove Old Battery: Take note of the battery orientation and carefully remove the old battery.
  3. Insert New Battery: Place the new CR2032 battery in the same orientation as the old one.
  4. Reassemble Key Fob: Snap the key fob case back together, ensuring it is secure.
Step 3: Reprogram the Key Fob
  1. Enter Programming Mode:
    • Sit inside the vehicle with the door closed.
    • Insert the key into the ignition and cycle it from OFF to ON (without starting the engine) 5 times within 10 seconds. Leave in the ON position on the 5th cycle.
  2. Programming:
    • Press the "Lock" button on the key fob once. The doors should lock and unlock to confirm programming.
    • If you have multiple key fobs, repeat this process for each fob within 40 seconds.
  3. Exit Programming Mode: Turn the ignition to OFF to exit programming mode.
Step 4: Test the Key Fob
  • Attempt to Lock/Unlock: Press the lock and unlock buttons on the key fob to ensure they function correctly.
  • Test Engine Start: For models with push-to-start, press the button while the key fob is in the vehicle.
Step 5: Check for Signal Interference
  • Eliminate Interference: Move away from electronic devices or metal objects that may block the signal.
  • Try a Different Location: Test the key fob in various locations to rule out environmental interference.
Step 6: Use an OBD-II Scanner (Optional)
  • Check for Codes: If the key fob still doesn’t work, use an OBD-II scanner to check for any diagnostic trouble codes (DTCs) related to the keyless entry system.
  • Clear Codes: If any codes are present, clear them and retest the key fob.
Conclusion

After completing these steps, your key fob should work effectively with your 2021 Toyota Camry. If the issue persists, it may be necessary to consult a dealership or professional automotive technician for further diagnosis, as the problem could be with the vehicle’s keyless entry system or other electronic components.