AutoCodes – Mitsubishi – B1B20 Mitsubishi

B1B20 Mitsubishi Code - Right Side Curtain Squib 1 Circuit Low

Quick Answer

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and the wiring. Common causes include Faulty Right Side Curtain Squib 1, Right Side Curtain Squib 1 harness is open or shorted, Right Side Curtain Squib 1 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: B1B20 Mitsubishi indicates Right Side Curtain Squib 1 Circuit Low.
Common causes: Common causes include Faulty Right Side Curtain Squib 1, Right Side Curtain Squib 1 harness is open or shorted, Right Side Curtain Squib 1 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 1,081

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 Aug 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1B20 Mitsubishi Description

When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and the wiring. These circuits are maintained in a floating configuration at the module, (connected to neither power nor ground), as protection against inadvertent deployment. The use of the Supplemental Restraint System (SRS) Load Tool Adapter provides a test point, as well as a method for opening the shorting bar connections within the harness connector. The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 500 ms thereafter while the ignition is on.

OBDII Code B1B20 Mitsubishi - Right Side Curtain Squib 1 Circuit Low - AutoCodes.com — B1B20 Mitsubishi Code - Right Side Curtain Squib 1 Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1B20 Mitsubishi?

Faulty Right Side Curtain Squib 1
Right Side Curtain Squib 1 harness is open or shorted
Right Side Curtain Squib 1 circuit poor electrical connection
Faulty Right Side Curtain Airbag
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC B1B20 Mitsubishi?

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 B1B20 Mitsubishi 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 B1B20 Mitsubishi code?

Need more information on how to fix the B1B20 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B20 Mitsubishi code diagnosed by a professional: Find a repair shop in your area

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 B1B20 Mitsubishi Code

1. What are the common symptoms of OBDII code B1B20 in a Mitsubishi related to the Right Side Curtain Squib 1 Circuit Low?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the right side curtain airbag system.

2. What are the possible causes of the B1B20 OBDII code in a Mitsubishi?

- The code B1B20 indicates a fault in the Right Side Curtain Squib 1 Circuit Low, which can be caused by wiring issues, a faulty squib (airbag inflator), or a defective airbag control module.

3. How serious is the B1B20 OBDII code related to the Right Side Curtain Squib 1 Circuit Low in a Mitsubishi?

- The B1B20 code is related to the right side curtain airbag system, so it is important to address the issue promptly to ensure the proper functioning of the airbag system in case of an accident.

4. Can I continue to drive my Mitsubishi with the B1B20 OBDII code present?

- It is not recommended to continue driving the vehicle with the B1B20 code since it indicates a problem with the right side curtain airbag system, which could potentially fail to deploy in an accident.

5. How can I diagnose and repair the B1B20 OBDII code in my Mitsubishi?

- Diagnosing and repairing the B1B20 code typically involves inspecting the wiring, connectors, and components related to the right side curtain airbag system, and replacing any faulty parts as needed.

6. Is it safe to reset the OBDII code B1B20 related to the Right Side Curtain Squib 1 Circuit Low without fixing the underlying issue?

- It is not recommended to simply reset the code without addressing the root cause, as it may lead to the airbag system not functioning properly in the event of a collision.

7. How much does it cost to repair the B1B20 OBDII code in a Mitsubishi?

- The cost of repairing the B1B20 code can vary depending on the specific issue causing the fault, but it may involve replacing wiring, connectors, the squib, or the airbag control module.

8. Can a DIY enthusiast fix the B1B20 OBDII code issue in a Mitsubishi?

- While some aspects of diagnosing and repairing the B1B20 code may be within reach of a skilled DIY enthusiast, working on airbag systems can be complex and dangerous, so it is advisable to seek professional help.

9. How long does it take to repair the B1B20 OBDII code related to the Right Side Curtain Squib 1 Circuit Low?

- The repair time for the B1B20 code can vary based on the exact cause of the issue and the extent of the repair needed, but it may take a few hours to a full day to diagnose and fix the problem.

10. What should I do if the B1B20 OBDII code keeps coming back even after repairs in my Mitsubishi?

- If the B1B20 code persists after repairs, it may indicate an ongoing issue with the airbag system that requires further inspection by a professional technician to ensure proper functioning and safety.