Engine-CodesToyota – B27A6 2017 Toyota RAV4

B27A6 2017 Toyota RAV4 Code - Open In Rear Floor Electrical Key Oscillator Circuit

Quick Answer

The B27A6 diagnostic trouble code (DTC) for a 2017 Toyota RAV4 indicates an open in the rear floor electrical key oscillator circuit. Common causes include Damaged wiring in the rear floor area, Faulty key fob, Corrosion in the key oscillator circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B27A6 2017 Toyota RAV4 indicates Open In Rear Floor Electrical Key Oscillator Circuit.
Common causes
Common causes include Damaged wiring in the rear floor area, Faulty key fob, Corrosion in the key oscillator circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code B27A6 2017 Toyota RAV4 Description

The B27A6 diagnostic trouble code (DTC) for a 2017 Toyota RAV4 indicates an open in the rear floor electrical key oscillator circuit. This circuit is responsible for transmitting signals between the key fob and the vehicle's immobilizer system. When this circuit is compromised, it can lead to issues with starting the vehicle, as the immobilizer system may not recognize the key fob signal. This can result in the vehicle not starting or starting intermittently.

OBDII Code B27A6 2017 Toyota RAV4 - Open In Rear Floor Electrical Key Oscillator Circuit
B27A6 2017 Toyota RAV4 Code - Open In Rear Floor Electrical Key Oscillator Circuit

Common Causes of B27A6 2017 Toyota RAV4

  1. Damaged wiring in the rear floor area
  2. Faulty key fob
  3. Corrosion in the key oscillator circuit
  4. Loose connections in the circuit
  5. Faulty immobilizer system

Symptoms of B27A6 2017 Toyota RAV4

  1. Difficulty starting the vehicle
  2. Intermittent starting issues
  3. Inability to start the vehicle
  4. Key fob not being recognized by the immobilizer system
  5. Security system warning light illuminated on the dashboard

How to Fix B27A6 2017 Toyota RAV4

  1. Begin by inspecting the wiring in the rear floor area for any visible damage or corrosion. Repair or replace any damaged wiring.
  2. Check the key fob for proper functioning. Replace the key fob if it is found to be faulty.
  3. Inspect the key oscillator circuit for any loose connections. Tighten any loose connections to ensure proper signal transmission.
  4. Test the immobilizer system to determine if it is functioning correctly. Replace the immobilizer system if necessary.
  5. Clear the DTC from the vehicle's computer system using a diagnostic tool to reset the system and ensure the issue has been resolved.

Cost to Fix B27A6 2017 Toyota RAV4

The typical repair costs for addressing an open in the rear floor electrical key oscillator circuit on a 2017 Toyota RAV4 can range from $200 to $500. This estimate includes the cost of parts such as wiring, key fob, and immobilizer system components, as well as labor costs. It's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may charge less. It's recommended to check local rates for a more accurate estimate.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B27A6 2017 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B27A6 in a 2017 Toyota RAV4?

The common symptoms include issues with keyless entry, difficulty starting the vehicle, and malfunctioning remote key fobs.

2. What does the OBDII code B27A6 "Open In Rear Floor Electrical Key Oscillator Circuit" indicate in a 2017 Toyota RAV4?

This code indicates a problem with the electrical circuit for the key oscillator in the rear floor area of the vehicle.

3. What are the possible causes of OBDII code B27A6 in a 2017 Toyota RAV4?

Possible causes include damaged wiring, loose connections, faulty key oscillator components, or water damage in the rear floor area.

4. How can I diagnose the issue related to OBDII code B27A6 in my 2017 Toyota RAV4?

Diagnosing the problem involves inspecting the wiring, connectors, and key oscillator components in the rear floor area for any visible damage or issues.

5. Can I repair OBDII code B27A6 in my 2017 Toyota RAV4 myself?

Depending on your automotive repair skills, you may be able to address the issue by repairing or replacing damaged wiring, connectors, or key oscillator components in the rear floor area.

6. Is it safe to continue driving my 2017 Toyota RAV4 with OBDII code B27A6 present?

It is not recommended to drive the vehicle with this code present, as it can lead to further electrical issues or potential starting problems.

7. How much does it cost to fix OBDII code B27A6 in a 2017 Toyota RAV4?

The cost of fixing this code can vary depending on the extent of the damage and whether you choose to repair it yourself or have it done by a professional mechanic.

8. Can a faulty key fob cause OBDII code B27A6 to appear in a 2017 Toyota RAV4?

Yes, a faulty key fob or keyless entry system can contribute to triggering this code due to issues with the key oscillator circuit.

9. Will resetting the vehicle's computer clear OBDII code B27A6 in a 2017 Toyota RAV4?

Resetting the computer may temporarily clear the code, but if the underlying issue with the key oscillator circuit is not addressed, the code is likely to reappear.

10. How can I prevent OBDII code B27A6 from recurring in my 2017 Toyota RAV4?

Regularly inspecting and maintaining the key oscillator circuit components in the rear floor area can help prevent this code from reoccurring in the future.

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