OBD Guide
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B1366

Front-Passenger Seat Belt Pretensioner Open

B1366 is an OBD-II diagnostic trouble code meaning: Front-Passenger Seat Belt Pretensioner Open. Common causes: broken wires in the harness, damage to connectors. Estimated repair cost: $56–167.

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

Symptoms

  • The passive restraint system (SRS) malfunction indicator light is on.
  • The front passenger seat belt pretensioner does not engage in an accident.

Causes

  • Broken wires in the harness
  • Damage to connectors
  • Seat belt pretensioner malfunction
  • Problems with the SRS control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect connectors for damage or corrosion
  3. Measure the resistance of the pretensioner chain
  4. If necessary, replace the pretensioner or repair the wiring harness
  5. Reset the error and check the system

Related codes

B1365B1367B0100

FAQ

What does the B1366 code mean?

B1366 is an OBD-II diagnostic trouble code that indicates: Front-Passenger Seat Belt Pretensioner Open

What causes a B1366 error code?

The most common causes of B1366 include: Broken wires in the harness; Damage to connectors; Seat belt pretensioner malfunction; Problems with the SRS control unit.

How do I fix a B1366 diagnostic trouble code?

To fix B1366: Check the integrity of the wiring harness. Inspect connectors for damage or corrosion. Measure the resistance of the pretensioner chain. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1366?

Do not drive — repair immediately

How much does it cost to fix B1366?

The estimated repair cost for B1366 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat