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B1620 Toyota Code - Side Airbag Sensor Right Circuit Malfunction

Quick Answer

The B1620 code for Toyota vehicles indicates a Side Airbag Sensor Right Circuit Malfunction. Common causes include Faulty side airbag sensor, Damaged or corroded wiring in the circuit, Blown fuse related to the airbag system. 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
B1620 Toyota indicates Side Airbag Sensor Right Circuit Malfunction.
Common causes
Common causes include Faulty side airbag sensor, Damaged or corroded wiring in the circuit, Blown fuse related to the airbag system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code B1620 Toyota Description

The B1620 code for Toyota vehicles indicates a Side Airbag Sensor Right Circuit Malfunction. This means that there is a problem with the circuit that controls the right side airbag sensor. The airbag sensor is a crucial component of the vehicle's safety system, designed to detect impacts and deploy the airbags to protect occupants in the event of a collision. When this circuit malfunctions, it can compromise the effectiveness of the airbag system, potentially putting the vehicle's occupants at risk in the event of an accident.

OBDII Code B1620 Toyota - Side Airbag Sensor Right Circuit Malfunction
B1620 Toyota Code - Side Airbag Sensor Right Circuit Malfunction

Common Causes of B1620 Toyota

  1. Faulty side airbag sensor
  2. Damaged or corroded wiring in the circuit
  3. Blown fuse related to the airbag system
  4. Issues with the airbag control module
  5. Impact or collision that damaged the airbag sensor or wiring

Symptoms of B1620 Toyota

  1. Airbag warning light illuminated on the dashboard
  2. Inability to deploy the right side airbag in the event of a collision
  3. Intermittent or non-functional airbag system
  4. Diagnostic trouble code (DTC) B1620 stored in the vehicle's computer

How to Fix B1620 Toyota

  1. Diagnose the issue by using a scan tool to retrieve the fault codes and inspecting the airbag sensor and wiring for damage.
  2. Repair or replace any damaged wiring or connectors in the side airbag sensor right circuit.
  3. Test the circuit to ensure proper functionality and clear the fault codes from the vehicle's computer.
  4. If the issue persists, replace the side airbag sensor or the airbag control module as needed.
  5. After completing the repair, reset the airbag system and test the vehicle to ensure that the airbag warning light is no longer illuminated.

Cost to Fix B1620 Toyota

The cost of repairing a Side Airbag Sensor Right Circuit Malfunction can vary depending on the specific cause of the issue and the extent of the damage. In general, the repair costs for this type of problem can range from $200 to $500, including parts and labor. However, it's important to note that the actual cost may be higher if additional components need to be replaced or if there are other underlying issues with the airbag system. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle. Keep in mind that labor rates and diagnostic fees can vary based on location, vehicle make and model, and other factors.

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1620 Toyota Code

1. What are the common symptoms of OBDII code B1620 in a Toyota related to the Side Airbag Sensor Right Circuit Malfunction?

Common symptoms include the airbag warning light illuminating on the dashboard, the side airbag system being disabled, and potential issues with the right side airbag deployment in case of an accident.

2. What are the possible causes of the OBDII code B1620 in a Toyota indicating a Side Airbag Sensor Right Circuit Malfunction?

Potential causes include a faulty side airbag sensor on the right side, damaged wiring or connectors in the circuit, a malfunctioning airbag control module, or issues with the airbag deployment system.

3. How serious is the OBDII code B1620 indicating a Side Airbag Sensor Right Circuit Malfunction in a Toyota?

This code signifies a problem with the right side airbag sensor circuit, which could affect the proper deployment of the airbag in case of a collision. It is crucial to address this issue promptly to ensure the safety features of the vehicle are fully functional.

4. Can I continue driving my Toyota with the OBDII code B1620 related to the Side Airbag Sensor Right Circuit Malfunction?

It is not recommended to drive the vehicle with an active airbag fault code, as it may compromise the effectiveness of the airbag system in the event of an accident. It is advisable to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair the OBDII code B1620 in my Toyota indicating a Side Airbag Sensor Right Circuit Malfunction?

Diagnosis typically involves using a scan tool to retrieve the specific fault code and then inspecting the side airbag sensor, wiring, connectors, and airbag control module for any issues. Repair may involve replacing a faulty sensor, repairing damaged wiring, or addressing any other identified problems.

6. Is it possible to reset the OBDII code B1620 for the Side Airbag Sensor Right Circuit Malfunction in a Toyota without fixing the underlying issue?

Resetting the fault code without addressing the root cause will likely result in the code reappearing once the system detects the ongoing problem. It is essential to diagnose and repair the issue to ensure the airbag system functions correctly.

7. How much does it typically cost to repair the OBDII code B1620 related to the Side Airbag Sensor Right Circuit Malfunction in a Toyota?

The cost of repair can vary depending on the specific cause of the issue, the parts needed for replacement, and labor costs. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.

8. Are there any safety precautions I should take if the OBDII code B1620 indicating a Side Airbag Sensor Right Circuit Malfunction is present in my Toyota?

It is crucial to drive cautiously and be aware that the airbag system may not deploy correctly in the event of a collision. Avoid any aggressive driving maneuvers or situations that may increase the risk of an accident until the issue is resolved.

9. Can a DIY enthusiast with automotive experience repair the OBDII code B1620 related to the Side Airbag Sensor Right Circuit Malfunction in a Toyota?

While some basic troubleshooting steps can be performed by individuals with automotive experience, dealing with airbag systems can be complex and dangerous. It is recommended to seek professional assistance to ensure the repair is done correctly and safely.

10. How long does it typically take to repair the OBDII code B1620 for the Side Airbag Sensor Right Circuit Malfunction in a Toyota?

The repair time can vary based on the specific cause of the issue and the extent of the repair needed. Simple fixes like replacing a sensor or repairing wiring may take a few hours, while more complex issues could require additional time for diagnosis and repair.

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