B1820 Code - Short in Side Squib Right Circuit

Quick Answer

The B1820 diagnostic trouble code indicates a short in the Side Squib Right Circuit. Common causes include Faulty wiring in the side squib right circuit, Loose or corroded connections in the airbag system, Damage to the airbag system components. 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

B1820 indicates Short in Side Squib Right Circuit.

Common causes

Common causes include Faulty wiring in the side squib right circuit, Loose or corroded connections in the airbag system, Damage to the airbag system components.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
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Common Causes of B1820

Symptoms of B1820

How to Fix B1820

Cost to Fix B1820

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Code B1820 Information for Specific Makes

• B1820 Buick — Driver Seat Recline Rearward Switch Circuit
• B1820 Cadillac — Driver Seat Recline Rearward Switch Circuit
• B1820 Chevrolet — Driver Seat Recline Rearward Switch Circuit
• B1820 Chrysler — Hood Ajar Input Circuit High
• B1820 Dodge — Hood Ajar Input Circuit High
• B1820 GMC — Driver Seat Recline Rearward Switch Circuit
• B1820 Jeep — Hood Ajar Input Circuit High
• B1820 Lexus — Short in Side Squib Right Circuit
• B1820 RAM — Hood Ajar Input Circuit High
• B1820 Scion — Short in Side Squib Right Circuit
• B1820 Toyota — Short in Side Squib Right Circuit

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 B1820 Code

1. What are the common symptoms of OBDII code B1820 (Short in Side Squib Right Circuit)?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system deploying in case of an accident.

2. What are the possible causes of OBDII code B1820 (Short in Side Squib Right Circuit)?

- The code can be triggered by a short circuit in the side squib right circuit, faulty wiring or connectors, or a malfunctioning airbag module.

3. How serious is OBDII code B1820 (Short in Side Squib Right Circuit)?

- This code indicates a problem with the airbag system, which is a critical safety feature in the vehicle. It is important to address this issue promptly to ensure the airbags function correctly in an accident.

4. How can I diagnose OBDII code B1820 (Short in Side Squib Right Circuit)?

- Diagnosing this code typically involves using a scan tool to retrieve the specific fault code, inspecting the wiring and connectors in the side squib right circuit, and testing the airbag module for proper functionality.

5. Can I drive my vehicle with OBDII code B1820 (Short in Side Squib Right Circuit) present?

- It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the airbag system. Driving with a malfunctioning airbag system can compromise safety in the event of a collision.

6. How can I repair OBDII code B1820 (Short in Side Squib Right Circuit)?

- Repairing this code may involve addressing the specific cause, such as repairing or replacing damaged wiring, connectors, or the airbag module. It is advisable to seek assistance from a qualified technician for proper diagnosis and repair.

7. Is it possible to reset OBDII code B1820 (Short in Side Squib Right Circuit) without fixing the underlying issue?

- While clearing the fault code may temporarily turn off the warning light, the underlying issue causing the code will persist. It is essential to address the root cause of the problem to ensure proper functioning of the airbag system.

8. Can extreme temperatures affect OBDII code B1820 (Short in Side Squib Right Circuit)?

- Extreme temperatures can potentially worsen existing wiring or connector issues, leading to the triggering of this fault code. It is important to keep the vehicle in a suitable environment to prevent further damage.

9. How long does it take to repair OBDII code B1820 (Short in Side Squib Right Circuit)?

- The repair time for this code can vary depending on the specific cause of the issue and the extent of the repairs needed. It is recommended to consult with a professional technician for an accurate assessment of repair time.

10. Are there any recalls related to OBDII code B1820 (Short in Side Squib Right Circuit)?

- It is advisable to check with the vehicle manufacturer or a local dealership to inquire about any recalls related to this specific fault code. Recalls may exist for certain vehicles with known airbag system issues.