B1871 Lincoln Code - Passenger Air Bag Deactivation Switch Fault
Quick Answer
The Restraints Control Module (RCM) monitors status of Passenger Air Bag Deactivation (PAD) switch. Common causes include Faulty Passenger Air Bag Deactivation Switch, Passenger Air Bag Deactivation Switch harness is open or shorted, Passenger Air Bag Deactivation Switchcircuit 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
- B1871 Lincoln indicates Passenger Air Bag Deactivation Switch Fault.
- Common causes
- Common causes include Faulty Passenger Air Bag Deactivation Switch, Passenger Air Bag Deactivation Switch harness is open or shorted, Passenger Air Bag Deactivation Switchcircuit 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 B1871 Lincoln Description
What are the Possible Causes of the DTC B1871 Lincoln?
- Faulty Passenger Air Bag Deactivation Switch
- Passenger Air Bag Deactivation Switch harness is open or shorted
- Passenger Air Bag Deactivation Switchcircuit poor electrical connection
- Faulty Restraints Control Module (RCM)
How to Fix the DTC B1871 Lincoln?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1871 Lincoln 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 B1871 Lincoln Code
1. What does OBDII code B1871 mean on a Lincoln?
Code B1871 indicates a fault in the passenger airbag deactivation switch, which may prevent the proper activation or deactivation of the passenger airbag.
2. What are common symptoms of code B1871 in a Lincoln?
Common symptoms include the airbag warning light staying illuminated, issues with airbag deployment, and malfunctioning passenger airbag deactivation indicators.
3. What causes the B1871 code in a Lincoln?
The code can be caused by a faulty passenger airbag deactivation switch, damaged wiring or connectors, or a malfunction in the airbag system module.
4. Can I drive with the B1871 code active?
It is not recommended to drive with this code active, as it may affect the proper functioning of the airbag system and compromise passenger safety in the event of a collision.
5. How do I diagnose the B1871 code in a Lincoln?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the passenger airbag deactivation switch, and checking the associated wiring and connectors for damage or corrosion.
6. How can I fix the B1871 fault code in a Lincoln?
Repairs may include replacing the passenger airbag deactivation switch, repairing or replacing damaged wiring, or reprogramming or replacing the airbag control module.
7. How much does it cost to repair the B1871 code?
Repair costs vary depending on the specific issue, but replacing the deactivation switch typically costs $100–$300, including parts and labor.
8. Can a blown fuse cause the B1871 code in a Lincoln?
A blown fuse is unlikely to directly cause this code, but it’s worth checking the airbag system fuses as part of the diagnostic process.
9. Does the B1871 code require resetting after repairs?
Yes, after repairing the issue, the code should be cleared using an OBDII scanner, and the airbag system should be tested to ensure proper functionality.
10. Is the B1871 code specific to Lincolns?
No, this code is not exclusive to Lincoln vehicles, but the exact causes and repair procedures may vary between makes and models. Always consult the vehicle’s service manual for specifics.
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