AutoCodes – Toyota – B2251 2016 Toyota RAV4

B2251 2016 Toyota RAV4 Code - Back Door Closer Switch Malfunction

Quick Answer

The Multiplex Network Door ECU receives signals from the latch switch, sector switch, pawl switch, and back door courtesy switch, which are built into the Back Door Lock Assembly. Common causes include Faulty Back Door Lock Assembly, Back Door Lock Assembly harness is open or shorted, Back Door Lock 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: B2251 2016 Toyota RAV4 indicates Back Door Closer Switch Malfunction.
Common causes: Common causes include Faulty Back Door Lock Assembly, Back Door Lock Assembly harness is open or shorted, Back Door Lock 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.

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Code Popularity 338

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 Dec 10, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2251 2016 Toyota RAV4 Description

The Multiplex Network Door ECU receives signals from the latch switch, sector switch, pawl switch, and back door courtesy switch, which are built into the Back Door Lock Assembly. Based on these switch signals, the latch position of the back door lock assembly is determined. The Diagnostic Trouble Code (DTC) sets when a malfunction is detected in position information from the back door courtesy switch within a specified amount of time, while the back door closer is operating.

OBDII Code B2251 2016 Toyota RAV4 - Back Door Closer Switch Malfunction - AutoCodes.com — B2251 2016 Toyota RAV4 Code - Back Door Closer Switch Malfunction

What does this mean?

What are the Possible Causes of the DTC B2251 2016 Toyota RAV4?

Faulty Back Door Lock Assembly
Back Door Lock Assembly harness is open or shorted
Back Door Lock Assembly circuit poor electrical connection
Faulty Multiplex Network Door ECU

How to Fix the DTC B2251 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 B2251 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 B2251 2016 Toyota RAV4 code?

Need more information on how to fix the B2251 2016 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 B2251 2016 Toyota RAV4 Code

1. What does the OBDII code B2251 mean on a 2016 Toyota RAV4?

B2251 indicates a malfunction in the back door closer switch, which is part of the system that detects and assists in securely closing the rear liftgate.

2. What are the common symptoms of the B2251 code in a Toyota RAV4?

Symptoms may include the rear liftgate not fully closing, the power close feature not working, or a warning light or error message appearing on the dashboard.

3. What causes the B2251 code to appear?

Possible causes include a faulty back door closer switch, damaged wiring or connectors, or an issue with the power back door control ECU.

4. Can I still drive my Toyota RAV4 with the B2251 code?

Yes, the vehicle is still drivable, but you may experience issues with the rear liftgate not closing securely or functioning properly.

5. How do you diagnose the B2251 code in a Toyota RAV4?

A mechanic will typically use a scan tool to confirm the code, inspect the back door closer switch, and check the wiring and connectors for damage or disconnection.

6. How do you fix a B2251 code on a 2016 Toyota RAV4?

Repairs may involve replacing the back door closer switch, repairing damaged wiring or connectors, or reprogramming or replacing the power back door control ECU.

7. How much does it cost to fix the B2251 code on a Toyota RAV4?

Repair costs can vary but may range from $100 to $300, depending on whether the issue is with the switch, wiring, or ECU.

8. Can I reset the B2251 code without fixing the problem?

While you can clear the code using an OBDII scanner, it will likely return if the underlying issue is not resolved.

9. What tools are needed to troubleshoot the B2251 code?

Youâ€™ll need an OBDII scanner, a multimeter for testing electrical connections, and possibly basic hand tools to access the back door closer components.

10. Is the B2251 code common in the 2016 Toyota RAV4?

While not extremely common, it can occur, especially in vehicles that frequently use the power liftgate or are exposed to wear and tear in the back door area.