AutoCodes – Pontiac – B0021 Pontiac

B0021 Pontiac 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 Pontiac 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 3,187

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 Pontiac 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 Pontiac - Passenger Seat Side Air Bag Deployment Loop - AutoCodes.com — B0021 Pontiac Code - Passenger Seat Side Air Bag Deployment Loop

What does this mean?

What are the Possible Causes of the DTC B0021 Pontiac?

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 Pontiac?

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 Pontiac 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.

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

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Get the B0021 Pontiac 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 Pontiac Code

1. What are the common symptoms of OBDII code B0021 in a Pontiac related to the passenger seat side airbag deployment loop?

The common symptoms include the airbag warning light staying illuminated on the dashboard and a potential message indicating an issue with the passenger seat side airbag system.

2. What are the possible causes of OBDII code B0021 in a Pontiac?

The code B0021 in a Pontiac is often caused by a malfunction in the passenger seat side airbag deployment loop, which could be due to a faulty airbag module, wiring issues, or a defective seat sensor.

3. How can I diagnose the OBDII code B0021 in my Pontiac related to the passenger seat side airbag deployment loop?

To diagnose the issue, a professional diagnostic scan tool can be used to retrieve the specific fault code. Additionally, a thorough inspection of the airbag system wiring and components is necessary.

4. Can I still drive my Pontiac with the OBDII code B0021 related to the passenger seat side airbag deployment loop?

It is not recommended to drive the vehicle with an illuminated airbag warning light, as it indicates a potential safety risk in the event of a collision. It is advisable to have the issue diagnosed and repaired promptly.

5. What are some repair tips for fixing OBDII code B0021 in a Pontiac?

Repairing the issue may involve replacing the faulty airbag module, repairing damaged wiring, or recalibrating the seat sensor. It is recommended to seek assistance from a qualified mechanic to ensure proper repair.

6. Is it safe to attempt to repair OBDII code B0021 related to the passenger seat side airbag deployment loop in my Pontiac myself?

Due to the complexity and safety implications of airbag systems, it is recommended to have a professional mechanic or technician address the issue to ensure proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code B0021 in a Pontiac?

The cost of repairing OBDII code B0021 can vary depending on the specific cause of the issue and the labor rates in your area. It is advisable to obtain quotes from different repair shops for an accurate estimate.

8. Can resetting the OBDII code B0021 in a Pontiac temporarily resolve the issue?

Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem causing the code. It is important to address the root cause of the issue to ensure the airbag system functions properly.

9. How important is it to fix OBDII code B0021 in a Pontiac promptly?

It is crucial to address OBDII code B0021 promptly, as it indicates a potential fault in the passenger seat side airbag deployment loop. Delaying repairs could compromise the effectiveness of the airbag system in the event of an accident.

10. Can OBDII code B0021 in a Pontiac affect the overall safety of the vehicle?

Yes, OBDII code B0021 related to the passenger seat side airbag deployment loop can impact the safety of the vehicle, as the airbag system may not deploy correctly in a collision. It is important to address this issue to ensure the safety of occupants.