AutoCodes – Toyota – B27A4 2016 Toyota RAV4

B27A4 2016 Toyota RAV4 Code - Open in Passengers Side Rear Door Electrical Antenna Circuit

Quick Answer

The Certification ECU (Smart Key ECU Assembly) generates a request signal and transmits the signal to the Passengers Side Rear Door Outside Handle Assembly (electrical key antenna) at intervals of 0.25 seconds. Common causes include Faulty Passengers Side Rear Door Outside Handle Assembly, Passengers Side Rear Door Outside Handle Assembly harness is open or shorted, Passengers Side Rear Door Outside Handle Assembly circuit poor electrical connection. 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: B27A4 2016 Toyota RAV4 indicates Open in Passengers Side Rear Door Electrical Antenna Circuit.
Common causes: Common causes include Faulty Passengers Side Rear Door Outside Handle Assembly, Passengers Side Rear Door Outside Handle Assembly harness is open or shorted, Passengers Side Rear Door Outside Handle Assembly circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 225

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 18, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B27A4 2016 Toyota RAV4 Description

The Certification ECU (Smart Key ECU Assembly) generates a request signal and transmits the signal to the Passengers Side Rear Door Outside Handle Assembly (electrical key antenna) at intervals of 0.25 seconds. For the Passengers Side Rear Door Outside Handle Assembly (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the rear door at intervals of 0.25 seconds. The Diagnostic Trouble Code (DTC) B27A3 is stored by the Certification ECU (Smart Key ECU Assembly) when an open circuit is detected between the Certification ECU (Smart Key ECU Assembly) and Passengers Side Rear Door Outside Handle Assembly (electrical key antenna).

OBDII Code B27A4 2016 Toyota RAV4 - Open in Passengers Side Rear Door Electrical Antenna Circuit - AutoCodes.com — B27A4 2016 Toyota RAV4 Code - Open in Passengers Side Rear Door Electrical Antenna Circuit

What does this mean?

What are the Possible Causes of the DTC B27A4 2016 Toyota RAV4?

Faulty Passengers Side Rear Door Outside Handle Assembly
Passengers Side Rear Door Outside Handle Assembly harness is open or shorted
Passengers Side Rear Door Outside Handle Assembly circuit poor electrical connection
Faulty Certification ECU (Smart Key ECU Assembly)

How to Fix the DTC B27A4 2016 Toyota RAV4?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B27A4 2016 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B27A4 2016 Toyota RAV4 code?

Need more information on how to fix the B27A4 2016 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27A4 2016 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area

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 B27A4 2016 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B27A4 in a 2016 Toyota RAV4?

The common symptoms of OBDII code B27A4 in a 2016 Toyota RAV4 include issues with the passengers side rear door electrical antenna circuit, such as poor or no radio reception and malfunctioning keyless entry system.

2. What could cause the OBDII code B27A4 to trigger in a 2016 Toyota RAV4?

The most common cause of the OBDII code B27A4 in a 2016 Toyota RAV4 is an open or damaged wiring in the passengers side rear door electrical antenna circuit.

3. How can I diagnose the OBDII code B27A4 in my 2016 Toyota RAV4?

To diagnose the OBDII code B27A4 in a 2016 Toyota RAV4, you can use a diagnostic scanner to read the fault codes, visually inspect the wiring in the passengers side rear door, and perform continuity tests to locate the open circuit.

4. Can I repair the OBDII code B27A4 in my 2016 Toyota RAV4 myself?

If you have experience with automotive electrical systems, you may be able to repair the OBDII code B27A4 in your 2016 Toyota RAV4 yourself by locating and repairing the open circuit in the passengers side rear door electrical antenna circuit.

5. Is it safe to continue driving my 2016 Toyota RAV4 with the OBDII code B27A4?

While it may be safe to drive your 2016 Toyota RAV4 with the OBDII code B27A4, it is recommended to address the issue promptly to restore proper functionality to your passengers side rear door electrical antenna circuit.

6. Are there any temporary fixes for the OBDII code B27A4 in a 2016 Toyota RAV4?

Temporary fixes for the OBDII code B27A4 in a 2016 Toyota RAV4 may include checking and securing any loose wiring connections in the passengers side rear door electrical antenna circuit.

7. Will resetting the OBDII code B27A4 in my 2016 Toyota RAV4 make it go away permanently?

Resetting the OBDII code B27A4 in a 2016 Toyota RAV4 may temporarily clear the code, but if the underlying issue, such as an open circuit in the passengers side rear door electrical antenna circuit, is not addressed, the code is likely to reappear.

8. How much does it typically cost to repair the OBDII code B27A4 in a 2016 Toyota RAV4?

The cost to repair the OBDII code B27A4 in a 2016 Toyota RAV4 can vary depending on the extent of the damage and whether you choose to repair it yourself or seek professional assistance. It may involve costs for parts and labor.

9. Can extreme weather conditions affect the passengers side rear door electrical antenna circuit in a 2016 Toyota RAV4 and trigger the OBDII code B27A4?

Yes, extreme weather conditions, such as heavy rain or snow, can potentially damage the wiring in the passengers side rear door electrical antenna circuit of a 2016 Toyota RAV4, leading to the triggering of the OBDII code B27A4.

10. How can I prevent the OBDII code B27A4 from appearing again in my 2016 Toyota RAV4?

To prevent the OBDII code B27A4 from appearing again in your 2016 Toyota RAV4, regularly inspect the wiring in the passengers side rear door electrical antenna circuit for any signs of damage or wear, and address any issues promptly to maintain proper functionality.