AutoCodes – Toyota – B2779 2016 Toyota RAV4

B2779 2016 Toyota RAV4 Code - Engine Starter Communication Malfunction

Quick Answer

When an internal malfunction occurs in the Certification ECU (Smart Key ECU Assembly), the Certification ECU (Smart Key ECU Assembly) stores this Diagnostic Trouble Code (DTC). Common causes include Faulty Certification ECU (Smart Key ECU Assembly), Certification ECU harness is open or shorted, Certification 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: B2779 2016 Toyota RAV4 indicates Engine Starter Communication Malfunction.
Common causes: Common causes include Faulty Certification ECU (Smart Key ECU Assembly), Certification ECU harness is open or shorted, Certification 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 286

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 14, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2779 2016 Toyota RAV4 Description

When an internal malfunction occurs in the Certification ECU (Smart Key ECU Assembly), the Certification ECU (Smart Key ECU Assembly) stores this Diagnostic Trouble Code (DTC).

OBDII Code B2779 2016 Toyota RAV4 - Engine Starter Communication Malfunction - AutoCodes.com — B2779 2016 Toyota RAV4 Code - Engine Starter Communication Malfunction

What does this mean?

What are the Possible Causes of the DTC B2779 2016 Toyota RAV4?

Faulty Certification ECU (Smart Key ECU Assembly)
Certification ECU harness is open or shorted
Certification ECU circuit poor electrical connection

How to Fix the DTC B2779 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 B2779 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 B2779 2016 Toyota RAV4 code?

Need more information on how to fix the B2779 2016 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2779 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 B2779 2016 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B2779 in a 2016 Toyota RAV4?

- Common symptoms include difficulty starting the engine, intermittent starting issues, and the engine not cranking at all.

2. What could cause the Engine Starter Communication Malfunction (code B2779) in a 2016 Toyota RAV4?

- Possible causes include a faulty starter motor, damaged wiring in the starter circuit, a malfunctioning starter relay, or issues with the engine control module.

3. How can I diagnose the Engine Starter Communication Malfunction in my 2016 Toyota RAV4?

- Diagnose the issue by checking the starter motor for proper operation, inspecting the wiring for any damage, testing the starter relay, and using an OBDII scanner to read the specific fault codes.

4. Can a DIY enthusiast repair the Engine Starter Communication Malfunction (code B2779) in a 2016 Toyota RAV4?

- While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing issues related to the starter system may require professional expertise.

5. Is it safe to continue driving my 2016 Toyota RAV4 with the Engine Starter Communication Malfunction code B2779?

- It is not recommended to drive the vehicle with this issue as it can lead to unexpected stalling or complete engine failure, potentially leaving you stranded.

6. How much does it typically cost to repair the Engine Starter Communication Malfunction in a 2016 Toyota RAV4?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

7. Can a low battery voltage trigger the Engine Starter Communication Malfunction code B2779 in a 2016 Toyota RAV4?

- Yes, a low battery voltage or a weak battery can sometimes trigger this code as it affects the power supply to the starter system.

8. Are there any preventive measures to avoid the Engine Starter Communication Malfunction in a 2016 Toyota RAV4?

- Regular maintenance, such as checking the battery health, inspecting wiring for damage, and addressing any starting issues promptly, can help prevent this malfunction.

9. How long does it take to repair the Engine Starter Communication Malfunction in a 2016 Toyota RAV4?

- The repair time can vary based on the exact cause of the issue, but it may take a few hours to a day for a professional mechanic to diagnose and fix the problem.

10. Will resetting the OBDII codes clear the Engine Starter Communication Malfunction code B2779 in a 2016 Toyota RAV4?

- Resetting the codes may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.