B1933 Code - Air Bag Passenger Circuit Open Fault
Quick Answer
The B1933 diagnostic trouble code (DTC) indicates an issue with the airbag passenger circuit being open. Common causes include Damaged wiring or connectors in the passenger-side airbag circuit, Malfunctioning passenger-side airbag sensor, Faulty airbag module. 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
- B1933 indicates Air Bag Passenger Circuit Open Fault.
- Common causes
- Common causes include Damaged wiring or connectors in the passenger-side airbag circuit, Malfunctioning passenger-side airbag sensor, Faulty airbag module.
- 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 B1933 Description
The B1933 diagnostic trouble code (DTC) indicates an issue with the airbag passenger circuit being open. This means that there is a break or discontinuity in the circuit that prevents the proper functioning of the passenger-side airbag system. The airbag system is a crucial safety feature in modern vehicles, designed to deploy in the event of a collision to protect occupants from serious injury. When this code appears, it signifies a potential safety hazard that needs to be addressed promptly.
Common Causes of B1933
- Damaged wiring or connectors in the passenger-side airbag circuit.
- Malfunctioning passenger-side airbag sensor.
- Faulty airbag module.
- Corrosion or moisture in the airbag system components.
- Impact or collision that damaged the airbag system components.
Symptoms of B1933
- Airbag warning light illuminated on the dashboard.
- Diagnostic trouble code (DTC) B1933 stored in the vehicle's computer system.
- Passenger-side airbag not deploying during a collision.
- Intermittent loss of power to the passenger-side airbag system.
How to Fix B1933
- Consult the vehicle's service manual for specific diagnostic procedures related to the airbag passenger circuit open fault.
- Perform a visual inspection of the wiring, connectors, and sensors in the passenger-side airbag system to identify any visible damage or issues.
- Use a multimeter to test the continuity of the circuit and pinpoint the location of the open circuit fault.
- Repair or replace any damaged wiring, connectors, sensors, or components in the passenger-side airbag system.
- Clear the diagnostic trouble code (DTC) from the vehicle's computer system and perform a test to ensure the airbag system is functioning correctly.
Cost to Fix B1933
The cost of repairing a B1933 airbag passenger circuit open fault can vary depending on the specific cause of the issue and the extent of the damage. In general, the cost of parts for this repair could range from $100 to $500, depending on the components that need to be replaced. Labor costs for this repair could range from $150 to $300, based on the hourly rates of the auto repair shop. It's important to note that additional diagnostic time may be required to pinpoint the exact cause of the issue, which could incur additional costs. It is recommended to consult with a qualified mechanic or dealership to get an accurate estimate for repairing this specific issue.
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Code B1933 Information for Specific Makes
- B1933 Ford — Air Bag Passenger Circuit Open Fault
- B1933 Lincoln — Air Bag Passenger Circuit Open Fault
- B1933 Mazda — Air Bag Passenger Circuit Open Fault
- B1933 Mercury — Air Bag Passenger Circuit Open Fault
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 B1933 Code
What does the OBDII code B1933 mean?
B1933 indicates an open fault in the passenger airbag circuit, which means there is a disruption in the electrical connection that affects the airbag system's ability to deploy properly.
What symptoms might I experience with a B1933 code?
Common symptoms include the airbag warning light being illuminated on the dashboard and potential failure of the passenger airbag to deploy in the event of a collision.
What are common causes of the B1933 code?
Causes can include damaged wiring or connectors in the airbag circuit, a faulty airbag module, or issues with the airbag itself.
How can I diagnose a B1933 code?
Diagnosing a B1933 code typically involves using an OBDII scanner to confirm the code, visually inspecting the airbag wiring and connectors, and checking the airbag module for faults.
What repairs are needed for a B1933 code?
Repairs may involve repairing or replacing damaged wiring or connectors, replacing the airbag module, or fixing any other issues found in the airbag circuit.
Is it safe to drive with a B1933 code?
It is not safe to drive with a B1933 code as it indicates that the passenger airbag may not deploy during an accident, increasing the risk of injury.
Can I reset the B1933 code after repairs?
Yes, after making the necessary repairs, you can reset the code using an OBDII scanner. However, ensure the issue has been fixed before doing so to avoid the code reappearing.
How often should I check my airbag system?
It's a good practice to have your airbag system checked during regular vehicle maintenance, and you should address any airbag warning lights immediately.
What should I do if I can't find the source of the B1933 code?
If you cannot identify the source of the code, it may be best to consult a professional mechanic or an automotive technician who specializes in airbag systems for further diagnosis.
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