B140D Lincoln Code - Second Row Passenger Side Seatbelt Sensor Circuit
Quick Answer
The Restraint Control Module (RCM) continuously monitors the second row right safety belt buckle switch circuits for the following faults: Open circuit, Short to voltage, Short to ground, Current out of range, Faulted second row right safety belt buckle switch. Common causes include Faulty Second Row Passenger Side Seatbelt, Second Row Passenger Side Seatbelt harness is open or shorted, Second Row Passenger Side Seatbelt 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
- B140D Lincoln indicates Second Row Passenger Side Seatbelt Sensor Circuit.
- Common causes
- Common causes include Faulty Second Row Passenger Side Seatbelt, Second Row Passenger Side Seatbelt harness is open or shorted, Second Row Passenger Side Seatbelt 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 B140D Lincoln Description
What are the Possible Causes of the DTC B140D Lincoln?
- Faulty Second Row Passenger Side Seatbelt
- Second Row Passenger Side Seatbelt harness is open or shorted
- Second Row Passenger Side Seatbelt circuit poor electrical connection
- Faulty Restraint Control Module (RCM)
How to Fix the DTC B140D 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.
Code Tech Notes
B140D:12 Second Row Passenger Side Seatbelt Sensor Circuit Short to Battery
B140D:13 Second Row Passenger Side Seatbelt Sensor Circuit Open
B140D:1D Second Row Passenger Side Seatbelt Sensor Circuit Current Out of Range
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B140D 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 B140D Lincoln Code
1. What are the common symptoms of OBDII code B140D in a Lincoln related to the second-row passenger side seatbelt sensor circuit?
The common symptoms include the airbag warning light illuminating on the dashboard, the seatbelt reminder chime not working properly, and potential issues with the airbag system's functionality.
2. What are the possible causes of OBDII code B140D in a Lincoln?
Common causes of this code include a faulty seatbelt sensor, damaged wiring or connectors in the seatbelt circuit, or issues with the airbag control module.
3. How can I diagnose the issue related to the second-row passenger side seatbelt sensor circuit in my Lincoln?
To diagnose the problem, you can use an OBDII scanner to read the specific trouble code, visually inspect the seatbelt sensor and its wiring for any visible damage, and perform electrical tests to check for continuity and proper voltage.
4. Can I repair the OBDII code B140D in my Lincoln by myself, or do I need a professional mechanic?
Depending on your experience and comfort level with automotive repairs, you may be able to fix the issue yourself by replacing the faulty seatbelt sensor or repairing damaged wiring. However, if you are unsure or uncomfortable with the repair process, it is recommended to seek assistance from a professional mechanic.
5. Are there any temporary solutions to consider if I encounter the OBDII code B140D in my Lincoln?
While it's important to address the underlying issue causing the trouble code, you can temporarily reset the code using an OBDII scanner to turn off the warning light. Keep in mind that this is not a permanent solution and the problem should be properly diagnosed and repaired.
6. How critical is it to address the OBDII code B140D related to the second-row passenger side seatbelt sensor circuit in a Lincoln?
It is crucial to address this issue promptly, as it directly impacts the functionality of the airbag system and the overall safety of the vehicle's occupants in the event of a collision.
7. Will driving with the OBDII code B140D unresolved affect the vehicle's safety in a Lincoln?
Driving with this unresolved issue can compromise the proper functioning of the airbag system, potentially putting occupants at risk in the event of an accident. It is recommended to address the problem as soon as possible.
8. What is the typical cost to repair OBDII code B140D in a Lincoln related to the second-row passenger side seatbelt sensor circuit?
The cost of repairing this issue can vary depending on the specific cause of the problem, the need for replacement parts, and labor charges. It is advisable to obtain quotes from different mechanics or service centers for an accurate estimate.
9. Can the OBDII code B140D be triggered by a loose seatbelt or other minor issues?
While a loose seatbelt or other minor issues can trigger related symptoms, the OBDII code B140D specifically indicates a fault in the second-row passenger side seatbelt sensor circuit that requires proper diagnosis and repair.
10. Are there any recalls or technical service bulletins related to OBDII code B140D in Lincoln vehicles?
It is recommended to check with the manufacturer or authorized service center for any recalls or technical service bulletins related to this specific OBDII code in Lincoln vehicles, as they may offer guidance or solutions for the issue.
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