AutoCodes – Toyota – B126A 2014 Toyota RAV4

B126A 2014 Toyota RAV4 Code - Remote Engine Starter ECU Communication Stop

Quick Answer

The Main Body ECU (Multiplex Network Body ECU) communicates with the accessory ECU and accessory BERKES. Common causes include Faulty Main Body ECU (Multiplex Network Body ECU), Main Body ECU harness is open or shorted, Main Body ECU 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: B126A 2014 Toyota RAV4 indicates Remote Engine Starter ECU Communication Stop.
Common causes: Common causes include Faulty Main Body ECU (Multiplex Network Body ECU), Main Body ECU harness is open or shorted, Main Body ECU 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.

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Code Popularity 582

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 Nov 29, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B126A 2014 Toyota RAV4 Description

The Main Body ECU (Multiplex Network Body ECU) communicates with the accessory ECU and accessory BERKES. This Diagnostic Trouble Code (DTC) is output when there is no communication between the Main Body ECU (Multiplex Network Body ECU) and accessory ECU for 10 seconds or more.

OBDII Code B126A 2014 Toyota RAV4 - Remote Engine Starter ECU Communication Stop - AutoCodes.com — B126A 2014 Toyota RAV4 Code - Remote Engine Starter ECU Communication Stop

What does this mean?

What are the Possible Causes of the DTC B126A 2014 Toyota RAV4?

Faulty Main Body ECU (Multiplex Network Body ECU)
Main Body ECU harness is open or shorted
Main Body ECU circuit poor electrical connection

How to Fix the DTC B126A 2014 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 B126A 2014 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 B126A 2014 Toyota RAV4 code?

Need more information on how to fix the B126A 2014 Toyota RAV4 code? Get Access to Factory Service Manuals

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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 B126A 2014 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B126A in a 2014 Toyota RAV4?

The common symptoms include the remote engine starter not working, the inability to start the engine remotely, and possible issues with key fob communication.

2. What does the OBDII code B126A indicate in a 2014 Toyota RAV4?

OBDII code B126A indicates a communication stop between the remote engine starter ECU and other related systems in the vehicle.

3. What are the possible causes of OBDII code B126A in a 2014 Toyota RAV4?

Possible causes include wiring issues, faulty remote engine starter ECU, problems with key fob signal transmission, or a malfunction in the communication network.

4. How can I diagnose the OBDII code B126A in my 2014 Toyota RAV4?

Diagnosing this code may require checking the wiring connections, inspecting the remote engine starter ECU for any damage, testing the key fob signal, and using diagnostic tools to scan the communication network.

5. Is it safe to continue driving my 2014 Toyota RAV4 with OBDII code B126A?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the remote engine starter and related systems.

6. Can I repair OBDII code B126A in my 2014 Toyota RAV4 myself?

Depending on your technical skills and experience, you may be able to address simple causes like loose connections or faulty key fobs. However, complex issues may require professional diagnosis and repair.

7. How much does it cost to repair OBDII code B126A in a 2014 Toyota RAV4?

The repair costs can vary depending on the exact cause of the code and whether you choose to address it yourself or seek assistance from a mechanic. Costs may include parts and labor.

8. Are there any preventive measures to avoid OBDII code B126A in a 2014 Toyota RAV4?

Regularly inspecting the wiring connections, ensuring proper functioning of the key fob, and following the manufacturer's maintenance recommendations can help prevent issues leading to this code.

9. Can resetting the OBDII system clear the B126A code in a 2014 Toyota RAV4?

While clearing the code through an OBDII scanner may temporarily remove the warning light, it is essential to diagnose and address the underlying issue to prevent the code from reappearing.

10. How long does it typically take to repair OBDII code B126A in a 2014 Toyota RAV4?

The repair time can vary based on the cause of the code and the complexity of the repair process. It may range from a quick fix to a more involved troubleshooting and repair procedure.