Engine-Codes - Lexus - B1866 Lexus

B1866 Lexus Code - Open In Front Passenger Side Knee Airbag Squib Circuit

- Code Popularity: 4,798 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1866 Lexus?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Front Passenger Side Knee Airbag Assembly (Front Passenger Side Knee Squib)
  • Front Passenger Side Knee Airbag Assembly harness is open or shorted
  • Front Passenger Side Knee Airbag Assembly circuit poor electrical connection
  • Faulty Center Airbag Sensor Assembly
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How to Fix the DTC B1866 Lexus?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the B1866 Lexus code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Air Bag Warning Light ON

What Does the B1866 Lexus Code Mean?

The Front Passenger Side Knee Airbag Squib Circuit consists of the Airbag Sensor Assembly and the Front Passenger Side Knee Airbag Assembly. The circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Front Passenger Side Knee Airbag Squib Circuit.

B1866 Lexus Code - Open In Front Passenger Side Knee Airbag Squib Circuit

Need more Information on the Code?

Need more information on how to fix the B1866 Lexus code? Get Access to Factory Service Manuals

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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.