OBD Guide
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B1879

Seat Belt Driver Pretensioner Circuit Short To Ground

B1879 is an OBD-II diagnostic trouble code meaning: Seat Belt Driver Pretensioner Circuit Short To Ground. Common causes: damaged pretensioner wiring harness, short circuit in the pretensioner squib. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • The passive safety system can be disabled
  • Dashboard warning for seat belt fault

Causes

  • Damaged pretensioner wiring harness
  • Short circuit in the pretensioner squib
  • SRS control unit malfunction
  • Corrosion or oxidation of contacts

How to Fix

  1. Diagnose the SRS system using a scanner
  2. Check the integrity of the pretensioner wiring harness
  3. Check the resistance of the pretensioner squib
  4. Inspect contacts for corrosion
  5. Replace damaged components if necessary
  6. Reset the error and check the system

Related codes

B1878B1880B1881

FAQ

What does the B1879 code mean?

B1879 is an OBD-II diagnostic trouble code that indicates: Seat Belt Driver Pretensioner Circuit Short To Ground

What causes a B1879 error code?

The most common causes of B1879 include: Damaged pretensioner wiring harness; Short circuit in the pretensioner squib; SRS control unit malfunction; Corrosion or oxidation of contacts.

How do I fix a B1879 diagnostic trouble code?

To fix B1879: Diagnose the SRS system using a scanner. Check the integrity of the pretensioner wiring harness. Check the resistance of the pretensioner squib. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1879?

Limited driving only, diagnose soon

How much does it cost to fix B1879?

The estimated repair cost for B1879 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat