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AutoCodes – Toyota – B2228 Toyota

B2228 Toyota Code - Power Back Door Unit Motor Left Circuit

Quick Answer

The Power Back Door system enables the back door to be opened and closed automatically by a motor in accordance with signals from the back door control switch or the power back door button on an electrical key transmitter sub-assembly or door control transmitter. Common causes include Faulty Power Back Door (PBD) Unit Assembly Left (LH), Power Back Door Unit Assembly Left harness is open or shorted, Power Back Door Unit Assembly Left 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
B2228 Toyota indicates Power Back Door Unit Motor Left Circuit.
Common causes
Common causes include Faulty Power Back Door (PBD) Unit Assembly Left (LH), Power Back Door Unit Assembly Left harness is open or shorted, Power Back Door Unit Assembly Left 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 7,016
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Dec 09, 2022
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Code B2228 Toyota Description

The Power Back Door system enables the back door to be opened and closed automatically by a motor in accordance with signals from the back door control switch or the power back door button on an electrical key transmitter sub-assembly or door control transmitter. In addition, a door control switch assembly has been provided on the back door for convenience.
This Diagnostic Trouble Code (DTC) is output when the Multiplex Network Door ECU detects a Power Back Door (PBD) Unit Assembly set Left (LH) Motor malfunction.
OBDII Code B2228 Toyota - Power Back Door Unit Motor Left Circuit - AutoCodes.com
B2228 Toyota Code - Power Back Door Unit Motor Left Circuit
What does this mean?

What are the Possible Causes of the DTC B2228 Toyota?

  • Faulty Power Back Door (PBD) Unit Assembly Left (LH)
  • Power Back Door Unit Assembly Left harness is open or shorted
  • Power Back Door Unit Assembly Left circuit poor electrical connection
  • Faulty Multiplex Network Door ECU

How to Fix the DTC B2228 Toyota?

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 B2228 Toyota 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 B2228 Toyota code?

Need more information on how to fix the B2228 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2228 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

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 B2228 Toyota Code

1. What are the common symptoms of OBDII code B2228 in a Toyota related to the Power Back Door Unit Motor Left Circuit?

The common symptoms include the power back door not operating properly or failing to open or close as intended.

2. What are some possible causes of OBDII code B2228 in a Toyota?

Possible causes of this code include a faulty power back door motor, wiring issues in the circuit, or a malfunctioning control module.

3. How can I diagnose the cause of OBDII code B2228 in my Toyota?

To diagnose the issue, you can perform a visual inspection of the wiring, test the power back door motor, and use a scan tool to check for any other related trouble codes.

4. Can I repair OBDII code B2228 in my Toyota by myself?

If you have experience with automotive electrical systems and wiring, you may be able to repair this issue yourself. However, it is recommended to seek assistance from a professional if you are unsure.

5. Is it safe to drive my Toyota with OBDII code B2228 present?

It is not recommended to drive your vehicle with this code present, as it can lead to further issues with the power back door system.

6. How much does it typically cost to repair OBDII code B2228 in a Toyota?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the power back door motor, repairing wiring, or reprogramming the control module.

7. Are there any preventive measures to avoid OBDII code B2228 in my Toyota?

Regularly inspecting the power back door system for any signs of wear or damage, as well as addressing any issues promptly, can help prevent this code from appearing.

8. Can a low battery voltage trigger OBDII code B2228 in a Toyota?

Yes, a low battery voltage can sometimes trigger this code, so it's important to ensure your vehicle's battery is in good condition.

9. Will resetting the error codes clear OBDII code B2228 in my Toyota?

Resetting the error codes may temporarily clear the code, but if the underlying issue is not addressed, it is likely to reappear.

10. How urgent is it to address OBDII code B2228 in my Toyota?

While the severity may vary depending on the specific symptoms, it is generally recommended to address this code promptly to avoid potential issues with the power back door system.

Discuss the causes and fixes for B2228 Toyota OBDII Code

Submit a New Comment

  • Toyota harrier PBD Unit Motor LH Circuit B2228
    How to broblom press the button after back door
    2’3 inch open and hold what the resonance

    Reply to Comment

    • The B2228 code on your Toyota Harrier refers to a problem with the Power Back Door (PBD) Left Side Motor Circuit—basically, the system is detecting an issue with the left-side motor or its wiring.

      Based on your description:

      "Press the button, after back door opens 2–3 inches and stops..."

      This suggests the power back door starts to open but then stops, which usually means the system is detecting a fault and shutting down for safety.

      Possible Causes:

      1. Faulty left-side back door motor
      2. Wiring issue or loose connector at the motor
      3. Obstruction or binding in the back door mechanism (check for anything blocking movement)
      4. Damaged liftgate struts or misalignment
      5. Weak battery or low voltage to the motor

      What You Can Try:

      ✅ Manual Reset Procedure (works on some models):

      1. Turn off the engine.
      2. Open the back door manually all the way.
      3. Close it manually and then press and hold the PBD button for 5–10 seconds.
      4. Try opening the door again with the button and see if it works.

      ✅ Inspect the Motor & Wiring:

      • Remove the left side trim in the cargo area and check the motor, connector, and wiring for corrosion or damage.
      • If possible, test voltage at the motor when the button is pressed.

      ✅ Clear the Code & Retest:

      • Use a scan tool to clear the B2228 code.
      • Try operating the door again and see if the code returns.

      If the issue persists, the left-side motor or its circuit board may need replacement.

      Let us know if you want help locating the motor or testing the circuit!

      Reply to Comment
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