B1049Body / Restraints

Seatbelt Pretensioner Circuit Fault

B1049 indicates a fault in a seatbelt pretensioner circuit. The airbag module detected an electrical problem with the pretensioner that tightens the belt during a collision.

🚗 Not recommended. A pretensioner fault means the seatbelt may not tighten properly in a crash.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Wiring or connector fault to the pretensioner$100-$400

40%

Open or shorted wiring interrupts the pretensioner circuit.

#2Failed pretensioner$200-$700

30%

A faulty pretensioner igniter circuit sets the code.

#3Damaged connector at the seatbelt buckle or anchor$100-$400

20%

Connectors near the seatbelt are exposed to movement and wear.

#4Airbag control module fault$300-$900

10%

An internal module fault can misread the circuit.

🩺 Common Symptoms

Airbag warning light on
Restraint system fault message
Pretensioner disabled
Stored airbag codes

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$300

Shop Cost

$200-$800

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose B1049

1Scan the airbag module for the pretensioner circuit fault

2Inspect the pretensioner connector at the seatbelt

3Check the circuit wiring for damage

4Verify the connector is fully seated

❓ Frequently Asked Questions

Can I drive with B1049?

It is not recommended. The pretensioner may not tighten the belt in a crash. Have it diagnosed promptly.

What is a seatbelt pretensioner?

It is a device that instantly tightens the seatbelt during a collision to improve restraint.

What causes B1049?

Wiring or connector faults, a failed pretensioner, or an airbag module fault.

🔗 Related Codes

B1041B1015B1055B0081