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Engine-Codes – Generic – B1860

B1860 Code - Short in Driver Side Knee Airbag Squib Circuit

Quick Answer

The B1860 diagnostic trouble code (DTC) indicates a short in the driver side knee airbag squib circuit. Common causes include Short circuit in the wiring harness, Faulty driver side knee airbag squib, Loose or corroded electrical connections. 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
B1860 indicates Short in Driver Side Knee Airbag Squib Circuit.
Common causes
Common causes include Short circuit in the wiring harness, Faulty driver side knee airbag squib, Loose or corroded electrical connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B1860 Description

The B1860 diagnostic trouble code (DTC) indicates a short in the driver side knee airbag squib circuit. This means that there is an electrical issue in the circuit that controls the deployment of the driver side knee airbag in the event of a collision. The knee airbag is an important safety feature that helps protect the driver's lower body in frontal crashes by reducing the risk of leg injuries.

OBDII Code B1860 - Short in Driver Side Knee Airbag Squib Circuit
B1860 Code - Short in Driver Side Knee Airbag Squib Circuit

Common Causes of B1860

  1. Short circuit in the wiring harness.
  2. Faulty driver side knee airbag squib.
  3. Loose or corroded electrical connections.
  4. Defective airbag control module.
  5. Impact or collision that damaged the airbag system components.

Symptoms of B1860

  1. Airbag warning light on the dashboard illuminates.
  2. Driver side knee airbag may not deploy in a collision.
  3. Diagnostic trouble code B1860 is stored in the vehicle's computer.
  4. Loss of communication with the airbag control module.

How to Fix B1860

  1. Diagnose the issue using a scan tool to retrieve the DTC and pinpoint the source of the problem.
  2. Inspect the wiring harness for any visible damage or signs of a short circuit. Repair or replace any damaged wiring.
  3. Test the driver side knee airbag squib for continuity and proper operation. Replace if necessary.
  4. Check and tighten all electrical connections in the airbag system.
  5. Clear the DTC from the vehicle's computer and perform a test drive to ensure the issue has been resolved.

Cost to Fix B1860

The cost of repairing a short in the driver side knee airbag squib circuit can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the parts for this repair could range from $200 to $500, while the labor costs could be between $100 and $300. Overall, the total repair cost could be in the range of $300 to $800. It is important to keep in mind that these are rough estimates and actual costs may vary based on the vehicle make and model, location, and other factors. It is recommended to consult with a qualified mechanic for a more accurate cost estimate.

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Code B1860 Information for Specific Makes

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.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1860 Code

1. What are the common symptoms of OBDII code B1860 (Short in Driver Side Knee Airbag Squib Circuit)?

- The common symptoms include the airbag warning light illuminated on the dashboard and a diagnostic trouble code related to the driver side knee airbag circuit.

2. What are the possible causes of OBDII code B1860?

- The code B1860 is typically caused by a short circuit in the driver side knee airbag squib circuit, which may be due to damaged wiring, a defective squib, or a faulty airbag module.

3. How can I diagnose the issue related to OBDII code B1860?

- Diagnosing the issue involves using a scan tool to read the trouble codes, inspecting the wiring harness and connectors for damage, and testing the driver side knee airbag squib resistance for shorts.

4. Are there any safety concerns associated with OBDII code B1860?

- Yes, there are safety concerns as the driver side knee airbag may not deploy properly in the event of a collision if the issue causing code B1860 is not addressed promptly.

5. Can I continue driving my vehicle with OBDII code B1860 present?

- It is not recommended to drive the vehicle with the code B1860 active, as the driver side knee airbag may not function correctly in the event of an accident.

6. How can I repair OBDII code B1860?

- Repairing the code B1860 involves locating and repairing the short in the driver side knee airbag squib circuit, which may require repairing or replacing damaged wiring, the squib, or the airbag module.

7. Can I reset the OBDII code B1860 without fixing the underlying issue?

- Resetting the code without addressing the underlying issue will only temporarily clear the code, and it will likely reappear once the fault is detected again during system checks.

8. Are there any DIY repair tips for resolving OBDII code B1860?

- DIY repair tips include carefully inspecting the wiring for damage, ensuring proper connections, and testing the resistance of the driver side knee airbag squib to identify the short circuit.

9. Is it necessary to take my vehicle to a mechanic for OBDII code B1860 repair?

- While some DIY enthusiasts may be able to address the issue themselves, it is recommended to seek professional help from a qualified mechanic to ensure proper diagnosis and repair of the airbag system.

10. How can I prevent OBDII code B1860 from occurring in the future?

- To prevent code B1860, it is essential to perform regular maintenance checks on the airbag system, avoid tampering with the wiring, and address any issues promptly to maintain the safety of the vehicle.

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