OBD Guide
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B1881

Seat Belt Passenger Pretensioner Circuit Open

B1881 is an OBD-II diagnostic trouble code meaning: Seat Belt Passenger Pretensioner Circuit Open. Common causes: broken or damaged wiring, pretensioner malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • The security system malfunction indicator is on
  • Pretensioner does not work when tested
  • Error B1881 is stored in the control unit memory

Causes

  • Broken or damaged wiring
  • Pretensioner malfunction
  • Problems with the security control unit
  • Corrosion of contacts or connectors

How to Fix

  1. Check the integrity of the pretensioner circuit wiring and connectors.
  2. Check pretensioner chain resistance
  3. Replace the pretensioner if a fault is detected
  4. Check and replace the control unit if necessary
  5. Clean contacts from corrosion

Related codes

B1880B1882B1879

FAQ

What does the B1881 code mean?

B1881 is an OBD-II diagnostic trouble code that indicates: Seat Belt Passenger Pretensioner Circuit Open

What causes a B1881 error code?

The most common causes of B1881 include: Broken or damaged wiring; Pretensioner malfunction; Problems with the security control unit; Corrosion of contacts or connectors.

How do I fix a B1881 diagnostic trouble code?

To fix B1881: Check the integrity of the pretensioner circuit wiring and connectors.. Check pretensioner chain resistance. Replace the pretensioner if a fault is detected. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1881?

Do not drive — repair immediately

How much does it cost to fix B1881?

The estimated repair cost for B1881 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat