AutoCodes – Generic – B1B20

B1B20 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 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 1,897

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

What does this mean?

What are the Possible Causes of the DTC B1B20?

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

B1B20 Chrysler — Right Side Curtain Squib 1 Circuit Low
B1B20 Dodge — Right Side Curtain Squib 1 Circuit Low
B1B20 Jeep — Right Side Curtain Squib 1 Circuit Low
B1B20 Mitsubishi — Right Side Curtain Squib 1 Circuit Low
B1B20 RAM — Right Side Curtain Squib 1 Circuit Low

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 Code

1. What are the common symptoms of OBDII code B1B20 (Right Side Curtain Squib 1 Circuit Low)?

The common symptoms of OBDII code B1B20 include the airbag warning light being illuminated on the dashboard, failure of the right side curtain airbag to deploy in a collision, and potential issues with the entire airbag system.

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

Possible causes of OBDII code B1B20 include a faulty right side curtain airbag squib (igniter), damaged wiring or connectors in the airbag circuit, or a defective airbag control module.

3. How serious is OBDII code B1B20?

OBDII code B1B20 is a serious issue as it indicates a problem with the right side curtain airbag system. This can compromise the safety of the vehicle occupants in the event of a collision, so it should be addressed promptly.

4. Can I continue driving with OBDII code B1B20 present?

It is not recommended to continue driving with OBDII code B1B20 present, as it indicates a potential issue with the right side curtain airbag system. Continuing to drive with this code can put occupants at risk in the event of an accident.

5. How can OBDII code B1B20 be diagnosed?

Diagnosing OBDII code B1B20 typically involves using a diagnostic scanner to retrieve the code, conducting a visual inspection of the airbag system components, and performing electrical tests to pinpoint the exact cause of the issue.

6. What is the typical repair for OBDII code B1B20?

The typical repair for OBDII code B1B20 involves replacing the faulty right side curtain airbag squib, repairing damaged wiring or connectors, or reprogramming the airbag control module, depending on the root cause of the problem.

7. Can I reset OBDII code B1B20 without fixing the underlying issue?

While you can clear the OBDII code B1B20 using a diagnostic scanner, it is not recommended to do so without addressing the underlying problem. Resetting the code without fixing the issue will not resolve the safety concern with the airbag system.

8. How can I prevent OBDII code B1B20 from occurring?

To prevent OBDII code B1B20, it is essential to properly maintain the airbag system by following the manufacturer's recommended service intervals, avoiding physical damage to airbag components, and addressing any warning lights promptly.

9. Is OBDII code B1B20 a common issue in certain vehicle models?

OBDII code B1B20 may be more common in certain vehicle models known for airbag system issues or electrical problems. It is advisable to check for any recalls or technical service bulletins related to this code for specific vehicle models.

10. Can I repair OBDII code B1B20 myself, or do I need a professional mechanic?

Repairing OBDII code B1B20 can be complex and requires specialized knowledge of airbag systems and electrical components. It is recommended to have a professional mechanic diagnose and repair this code to ensure the safety and functionality of the airbag system.