OBD Guide
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B1903

Short to Positive in Front Pretensioner Squib Right Circuit

B1903 is an OBD-II diagnostic trouble code meaning: Short to Positive in Front Pretensioner Squib Right Circuit. Common causes: pretensioner circuit wiring harness damage, short circuit in the pretensioner squib. Estimated repair cost: $56–167.

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

Symptoms

  • SRS/Airbag light is on
  • The passive safety system may not work in an accident.

Causes

  • Pretensioner circuit wiring harness damage
  • Short circuit in the pretensioner squib
  • SRS control unit malfunction
  • Corrosion of contacts in system connectors

How to Fix

  1. Conduct a visual inspection of the wiring harness and connectors for damage.
  2. Check the resistance of the pretensioner squib circuit with a multimeter
  3. Diagnose the SRS control unit for errors
  4. Replace damaged components (harness, squib, control unit)

Related codes

B1900B1901B1902B1904

FAQ

What does the B1903 code mean?

B1903 is an OBD-II diagnostic trouble code that indicates: Short to Positive in Front Pretensioner Squib Right Circuit

What causes a B1903 error code?

The most common causes of B1903 include: Pretensioner circuit wiring harness damage; Short circuit in the pretensioner squib; SRS control unit malfunction; Corrosion of contacts in system connectors.

How do I fix a B1903 diagnostic trouble code?

To fix B1903: Conduct a visual inspection of the wiring harness and connectors for damage.. Check the resistance of the pretensioner squib circuit with a multimeter. Diagnose the SRS control unit for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1903?

Do not drive — repair immediately

How much does it cost to fix B1903?

The estimated repair cost for B1903 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat