OBD Guide
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B1431

Right Seat Belt Pre-Tensioner Circuit

B1431 is an OBD-II diagnostic trouble code meaning: Right Seat Belt Pre-Tensioner Circuit. Common causes: pretensioner circuit break, faulty pretensioner squib. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • Airbag indicator on dashboard
  • Malfunction in the SRS system
  • Inability to activate the pretensioner in an accident

Causes

  • Pretensioner circuit break
  • Faulty pretensioner squib
  • Wiring harness damage
  • Short circuit in the circuit
  • SRS control unit malfunction

How to Fix

  1. Diagnostics of the pretensioner circuit using an OBD-II scanner
  2. Visually inspect the wiring harness and connectors for damage
  3. Checking the squib resistance
  4. Replacement of faulty components (squib, wiring harness)
  5. Resetting the error and re-diagnosis

Related codes

B1425B1426B1430B1432

FAQ

What does the B1431 code mean?

B1431 is an OBD-II diagnostic trouble code that indicates: Right Seat Belt Pre-Tensioner Circuit

What causes a B1431 error code?

The most common causes of B1431 include: Pretensioner circuit break; Faulty pretensioner squib; Wiring harness damage; Short circuit in the circuit.

How do I fix a B1431 diagnostic trouble code?

To fix B1431: Diagnostics of the pretensioner circuit using an OBD-II scanner. Visually inspect the wiring harness and connectors for damage. Checking the squib resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1431?

Do not drive — repair immediately

How much does it cost to fix B1431?

The estimated repair cost for B1431 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat