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AutoCodes - Generic - B1881

B1881 Code - Seat Belt Passenger Pretensioner Circuit Open

- Code Popularity: 25,848 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1881?

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 Seat Belt Passenger Pretensioner
  • Seat Belt Passenger Pretensioner harness is open or shorted
  • Seat Belt Passenger Pretensioner circuit poor electrical connection
  • Faulty Restraints Control Module (RCM)
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How to Fix the DTC B1881?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1881 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Air Bag Warning Light ON

Code B1881 Description

The Restraints Control Module (RCM) checks all of the Safety Seat Belt Pretensioners for faults. If the RCM detects a low resistance or open on the Passenger Safety Seat Belt Pretensioner circuits, it will store the Diagnostic Trouble Code (DTC) B1881 in memory and illuminate the air bag warning indicator.

OBDII Code B1881 - Seat Belt Passenger Pretensioner Circuit Open - AutoCodes.com
B1881 Code - Seat Belt Passenger Pretensioner Circuit Open

Need More Information on the Code?

Need more information on how to fix the B1881 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • B1881 Ford Seat Belt Passenger Pretensioner Circuit Open
  • B1881 Lincoln Seat Belt Passenger Pretensioner Circuit Open
  • B1881 Mazda Seat Belt Passenger Pretensioner Circuit Open
  • B1881 Mercury Seat Belt Passenger Pretensioner Circuit Open

Need Help with the Code?

Get the B1881 code diagnosed by a professional: Find a repair shop in your area

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.

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