B0021:01 Code - Passenger Seat Side Air Bag Deployment Loop Short to Battery
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
- B0021:01 indicates Passenger Seat Side Air Bag Deployment Loop Short to Battery.
- 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.
Code B0021:01 Description
What are the Possible Causes of the DTC B0021:01?
- 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 B0021:01?
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.
Code Tech Notes
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 B0021:01 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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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.
Frequently Asked Questions about B0021:01 Code
What does the OBDII code B0021:01 mean?
The code B0021:01 indicates a short to battery in the passenger seat side airbag deployment loop circuit.
What are the common symptoms of code B0021:01?
Symptoms include an illuminated airbag warning light, possible malfunction messages in the dashboard, and the airbag system being disabled.
What causes the B0021:01 code to appear?
This code is typically caused by damaged wiring, a short circuit, a faulty airbag module, or issues with connectors related to the passenger seat side airbag.
Can the airbag system still function if code B0021:01 is present?
No, the airbag system may be disabled when this code is active, posing a safety risk in the event of an accident.
How can I diagnose the root cause of code B0021:01?
Use a scan tool to confirm the code, visually inspect the wiring and connectors for damage, and test the airbag module for proper functionality.
Is it safe to drive with code B0021:01 active?
While the vehicle may still be drivable, the airbag system is compromised, which is a safety concern and should be addressed promptly.
Can a short to battery in the airbag circuit cause other electrical issues?
Yes, a short to battery could potentially affect other electrical components or lead to system malfunctions.
How can I repair code B0021:01?
Repairs may involve replacing damaged wiring, connectors, or the airbag module, and should be performed by a qualified technician due to safety concerns.
Can code B0021:01 be cleared without fixing the underlying issue?
Clearing the code without addressing the cause will result in the code reappearing and the airbag system remaining disabled.
Should I use an aftermarket airbag module to repair code B0021:01?
It is recommended to use OEM components to ensure compatibility and proper functioning of the airbag system.
Discuss the causes and fixes for B0021:01 OBDII Code
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