AutoCodes – Toyota – B126A 2013 Toyota RAV4

B126A 2013 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 2013 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 948

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 2013 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 2013 Toyota RAV4 - Remote Engine Starter ECU Communication Stop - AutoCodes.com — B126A 2013 Toyota RAV4 Code - Remote Engine Starter ECU Communication Stop

What does this mean?

What are the Possible Causes of the DTC B126A 2013 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 2013 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 2013 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 2013 Toyota RAV4 code?

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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 2013 Toyota RAV4 Code

1. What does OBDII code B126A for a 2013 Toyota RAV4 indicate?

The B126A code specifically relates to a communication issue with the Remote Engine Starter ECU.

2. What are common symptoms associated with the B126A code on a 2013 Toyota RAV4?

Common symptoms include the remote engine starter not functioning, difficulty starting the vehicle remotely, and the inability to communicate with the remote start system.

3. What are some possible causes of the B126A code on a 2013 Toyota RAV4?

Potential causes of the B126A code can include a faulty Remote Engine Starter ECU, wiring issues, poor connections, or a malfunctioning remote transmitter.

4. How can I diagnose the B126A code on my 2013 Toyota RAV4?

Diagnosing the B126A code may involve checking the wiring connections to the Remote Engine Starter ECU, testing the remote transmitter, and using a diagnostic scan tool to communicate with the ECU.

5. Can I still drive my 2013 Toyota RAV4 with the B126A code present?

While the B126A code itself may not affect the drivability of the vehicle, it is recommended to address the issue promptly to ensure the proper functioning of the remote engine starter system.

6. How can I repair the B126A code on my 2013 Toyota RAV4?

Repairing the B126A code may involve replacing the Remote Engine Starter ECU if it is found to be faulty, repairing any damaged wiring, ensuring proper connections, and reprogramming the remote transmitter if necessary.

7. Is it possible to reset the B126A code on a 2013 Toyota RAV4 without repairs?

Resetting the B126A code without addressing the underlying issue may only provide a temporary solution. It is recommended to diagnose and repair the root cause of the code for a lasting fix.

8. Can weather conditions affect the occurrence of the B126A code on a 2013 Toyota RAV4?

Extreme weather conditions, such as temperature fluctuations or moisture exposure, can potentially impact the functioning of the remote engine starter system and contribute to the B126A code.

9. How long does it typically take to repair the B126A code on a 2013 Toyota RAV4?

The repair time for the B126A code can vary depending on the specific cause of the issue, availability of parts, and the expertise of the technician. It is advisable to consult with a professional for an accurate estimate.

10. Is the repair for the B126A code covered under warranty for a 2013 Toyota RAV4?

Warranty coverage for the B126A code repair would depend on the vehicle's warranty status, mileage, and the specific terms and conditions of the warranty. It is advisable to check with the dealership or manufacturer for warranty coverage details.