B1871 Ford Code - Passenger Air Bag Deactivation Switch Fault
Quick Answer
The B1871 Ford code indicates a fault with the passenger airbag deactivation switch in the vehicle. Common causes include Faulty passenger airbag deactivation switch, Wiring issues or loose connections in the airbag system, Malfunctioning airbag control 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
- B1871 Ford indicates Passenger Air Bag Deactivation Switch Fault.
- Common causes
- Common causes include Faulty passenger airbag deactivation switch, Wiring issues or loose connections in the airbag system, Malfunctioning airbag control 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 B1871 Ford Description
The B1871 Ford code indicates a fault with the passenger airbag deactivation switch in the vehicle. This switch is designed to allow the passenger airbag to be turned off in certain situations, such as when a child is seated in the front passenger seat. When this code is triggered, it means that the system is not functioning correctly, potentially putting occupants at risk in the event of a collision. This issue can compromise the overall safety of the vehicle and should be addressed promptly.
Common Causes of B1871 Ford
- Faulty passenger airbag deactivation switch.
- Wiring issues or loose connections in the airbag system.
- Malfunctioning airbag control module.
- Impact or damage to the passenger airbag system.
- Electrical issues within the vehicle's system.
Symptoms of B1871 Ford
- Airbag warning light illuminated on the dashboard.
- Inability to deactivate the passenger airbag.
- False readings from the airbag system.
- Intermittent operation of the passenger airbag.
- Failure of the passenger airbag to deploy in a collision.
How to Fix B1871 Ford
- Begin by diagnosing the specific cause of the fault code using a diagnostic scanner.
- Inspect the passenger airbag deactivation switch for any visible damage or malfunction.
- Check the wiring and connections in the airbag system for any faults or loose connections.
- Test the airbag control module to determine if it is functioning properly.
- Replace any faulty components, such as the switch, wiring, or control module, and reset the airbag system.
Cost to Fix B1871 Ford
The cost of repairing a B1871 Ford code can vary depending on the specific cause of the issue and the labor rates of the repair shop. In general, the repair for this type of fault could range from $200 to $500, including parts and labor. However, it's important to note that prices can fluctuate based on the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. It's recommended to obtain quotes from multiple repair shops to compare costs and ensure a fair price.
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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 B1871 Ford Code
1. What does the OBDII code B1871 mean on a Ford vehicle?
Code B1871 indicates a fault in the Passenger Air Bag Deactivation (PAD) switch circuit, which may prevent proper control of the passenger airbag system.
2. What are the common symptoms of code B1871 in a Ford?
Typical symptoms include the airbag warning light illuminating on the dashboard and the passenger airbag failing to activate or deactivate as intended.
3. What causes the B1871 Passenger Air Bag Deactivation Switch Fault?
Common causes include a faulty PAD switch, damaged wiring or connectors, or an issue with the airbag system control module.
4. Can I continue driving with the B1871 code active?
While the vehicle may still be drivable, the passenger airbag system may not function properly, which could pose a safety risk in the event of a collision.
5. How can I diagnose the B1871 code on my Ford?
Use an OBDII scanner to confirm the code, then inspect the PAD switch, related wiring, and connectors for damage or poor connections.
6. Is the B1871 code specific to Ford vehicles?
While B1871 is a generic OBDII code, its meaning and troubleshooting steps may vary by manufacturer. On Ford vehicles, it specifically pertains to the PAD switch circuit.
7. How do I fix the B1871 Passenger Air Bag Deactivation Switch Fault?
Repairs may involve replacing the PAD switch, repairing damaged wiring or connectors, or reprogramming the airbag control module if necessary.
8. How much does it cost to repair the B1871 code on a Ford?
Repair costs depend on the exact issue but typically range from $100 to $500, depending on whether the PAD switch or wiring needs replacement.
9. Can a faulty PAD switch cause the airbag warning light to stay on?
Yes, a malfunctioning PAD switch can trigger the airbag warning light due to a fault in the passenger airbag system.
10. Do I need to reset the OBDII system after fixing the B1871 code?
Yes, after completing repairs, use an OBDII scanner to clear the code and ensure the issue does not reoccur.
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