OBD Guide
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B1177

Right Front Seat Belt Buckle Pre-Tensioner Open

B1177 is an OBD-II diagnostic trouble code meaning: Right Front Seat Belt Buckle Pre-Tensioner Open. Common causes: broken wires in the pretensioner circuit, poor contact in connectors. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • Error B1177 in diagnostic scanner memory
  • The right front seat belt pretensioner does not work

Causes

  • Broken wires in the pretensioner circuit
  • Poor contact in connectors
  • Seat belt pretensioner malfunction
  • Wiring harness damage
  • Malfunction of the airbag control unit

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect connectors for oxidation or damage
  3. Measure the resistance of the pretensioner chain
  4. Check the fuses and relays of the passive restraint system
  5. Replace seat belt pretensioner if necessary
  6. Reset the error and check the system operation

Related codes

B1178B0100B0101

FAQ

What does the B1177 code mean?

B1177 is an OBD-II diagnostic trouble code that indicates: Right Front Seat Belt Buckle Pre-Tensioner Open

What causes a B1177 error code?

The most common causes of B1177 include: Broken wires in the pretensioner circuit; Poor contact in connectors; Seat belt pretensioner malfunction; Wiring harness damage.

How do I fix a B1177 diagnostic trouble code?

To fix B1177: Check the integrity of the wiring harness. Inspect connectors for oxidation or damage. Measure the resistance of the pretensioner chain. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1177?

Do not drive — repair immediately

How much does it cost to fix B1177?

The estimated repair cost for B1177 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat