OBD Guide
ENFRDEESPT

B1905

Short in Front Pretensioner Squib Left Circuit

B1905 is an OBD-II diagnostic trouble code meaning: Short in Front Pretensioner Squib Left Circuit. Common causes: wiring harness damage, pretensioner squib malfunction. Estimated repair cost: $56–222.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–222 (est.)

Symptoms

  • Airbag light is on
  • The passive safety system may not work in an accident.
  • Error B1905 stored in ECU memory

Causes

  • Wiring harness damage
  • Pretensioner squib malfunction
  • Short circuit in the circuit
  • Problems with the airbag control unit

How to Fix

  1. Conduct a visual inspection of the wiring harness in the area of the left pretensioner
  2. Check the resistance of the pretensioner squib
  3. Check the circuit for short circuit
  4. Replace damaged elements (harness, squib)
  5. Reset the error and check system functionality

Related codes

B1900B1901B1902

FAQ

What does the B1905 code mean?

B1905 is an OBD-II diagnostic trouble code that indicates: Short in Front Pretensioner Squib Left Circuit

What causes a B1905 error code?

The most common causes of B1905 include: Wiring harness damage; Pretensioner squib malfunction; Short circuit in the circuit; Problems with the airbag control unit.

How do I fix a B1905 diagnostic trouble code?

To fix B1905: Conduct a visual inspection of the wiring harness in the area of the left pretensioner. Check the resistance of the pretensioner squib. Check the circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1905?

Do not drive — repair immediately

How much does it cost to fix B1905?

The estimated repair cost for B1905 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat