AutoCodes – Chevrolet – B0021 2017 Chevrolet Silverado

B0021 2017 Chevrolet Silverado Code - Passenger Seat Side Air Bag Deployment Loop

Quick Answer

A Diagnostic Trouble Code (DTC) will be stored in non-volatile memory if a malfunction is detected. Common causes include Faulty Passenger Seat Side Air Bag, Passenger Seat Side Air Bag harness is open or shorted, Passenger Seat Side Air Bag 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: B0021 2017 Chevrolet Silverado indicates Passenger Seat Side Air Bag Deployment Loop.
Common causes: Common causes include Faulty Passenger Seat Side Air Bag, Passenger Seat Side Air Bag harness is open or shorted, Passenger Seat Side Air Bag 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 813

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 Oct 09, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0021 2017 Chevrolet Silverado Description

A Diagnostic Trouble Code (DTC) will be stored in non-volatile memory if a malfunction is detected. During a side or frontal crash of sufficient force, the inflatable restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the passenger seat side air bag. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. A shorting bar is used within the passenger seat side air bag connector which will short together both high and low circuits when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.

OBDII Code B0021 2017 Chevrolet Silverado - Passenger Seat Side Air Bag Deployment Loop - AutoCodes.com — B0021 2017 Chevrolet Silverado Code - Passenger Seat Side Air Bag Deployment Loop

What does this mean?

What are the Possible Causes of the DTC B0021 2017 Chevrolet Silverado?

Faulty Passenger Seat Side Air Bag
Passenger Seat Side Air Bag harness is open or shorted
Passenger Seat Side Air Bag circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0021 2017 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

B0021:01 Passenger Seat Side Air Bag Deployment Loop Short to Battery
B0021:02 Passenger Seat Side Air Bag Deployment Loop Short to Ground
B0021:04 Passenger Seat Side Air Bag Deployment Loop Open
B0021:0D Passenger Seat Side Air Bag Deployment Loop High Resistance
B0021:0E Passenger Seat Side Air Bag Deployment Loop Low Resistance

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0021 2017 Chevrolet Silverado 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 B0021 2017 Chevrolet Silverado code?

Need more information on how to fix the B0021 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0021 2017 Chevrolet Silverado 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 B0021 2017 Chevrolet Silverado Code

1. What does OBDII code B0021 for a 2017 Chevrolet Silverado indicate?

The B0021 code specifically relates to the passenger seat side airbag deployment loop circuit.

2. What are the common symptoms of OBDII code B0021 in a 2017 Chevrolet Silverado?

Common symptoms include the airbag warning light staying illuminated on the dashboard and potential non-deployment of the passenger side airbag during an accident.

3. What are the possible causes of OBDII code B0021 in a 2017 Chevrolet Silverado?

Potential causes of the B0021 code could include a faulty passenger seat side airbag deployment loop, damaged wiring or connectors in the airbag system, or a problem with the airbag control module.

4. How can I diagnose the issue related to OBDII code B0021 in my 2017 Chevrolet Silverado?

Diagnosing the problem may involve using a diagnostic scanner to retrieve the specific fault codes, visually inspecting the wiring and connectors related to the passenger seat side airbag, and performing circuit testing to identify any faults.

5. Can I continue to drive my 2017 Chevrolet Silverado with OBDII code B0021?

It is not recommended to drive the vehicle with unresolved airbag issues, as the passenger side airbag may not deploy in the event of an accident, potentially compromising safety.

6. What are some repair tips for fixing OBDII code B0021 in a 2017 Chevrolet Silverado?

Repair tips may include checking and repairing any damaged wiring or connectors, replacing the faulty passenger seat side airbag deployment loop, or resetting the airbag control module after the issue has been addressed.

7. Should I attempt to fix OBDII code B0021 in my 2017 Chevrolet Silverado myself?

Due to the complexity and safety implications of airbag systems, it is recommended to have the issue diagnosed and repaired by a qualified automotive technician or dealership.

8. How much does it typically cost to fix OBDII code B0021 in a 2017 Chevrolet Silverado?

The cost of repairing the B0021 code can vary depending on the specific cause of the issue, with potential costs including parts replacement, labor charges, and diagnostic fees.

9. Is OBDII code B0021 a common issue in 2017 Chevrolet Silverado vehicles?

While the B0021 code can occur in 2017 Chevrolet Silverado vehicles, its frequency may vary depending on factors such as vehicle usage and maintenance.

10. Can OBDII code B0021 in a 2017 Chevrolet Silverado be prevented?

Regular maintenance and inspections of the airbag system, including checking for any warning lights or unusual sounds, can help prevent issues like the B0021 code from occurring.