OBD Guide
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B1185

Left Front Seat Belt Buckle Pre-Tensioner Short

B1185 is an OBD-II diagnostic trouble code meaning: Left Front Seat Belt Buckle Pre-Tensioner Short. Common causes: damage to wiring or wiring harness, seat belt pretensioner malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • The security system malfunction indicator is on
  • Belt pretensioner does not engage when tested
  • Error B1185 is stored in the control unit memory

Causes

  • Damage to wiring or wiring harness
  • Seat belt pretensioner malfunction
  • Problems with the security control unit
  • Short circuit in power or control circuit

How to Fix

  1. Check the integrity of the wiring and wiring harness
  2. Check the resistance and continuity of the pretensioner circuit
  3. Replace seat belt pretensioner if necessary
  4. Check and replace the control unit if a malfunction is detected
  5. Clear error memory and check if error is returned

Related codes

B1184B1186B1187

FAQ

What does the B1185 code mean?

B1185 is an OBD-II diagnostic trouble code that indicates: Left Front Seat Belt Buckle Pre-Tensioner Short

What causes a B1185 error code?

The most common causes of B1185 include: Damage to wiring or wiring harness; Seat belt pretensioner malfunction; Problems with the security control unit; Short circuit in power or control circuit.

How do I fix a B1185 diagnostic trouble code?

To fix B1185: Check the integrity of the wiring and wiring harness. Check the resistance and continuity of the pretensioner circuit. Replace seat belt pretensioner if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1185?

Do not drive — repair immediately

How much does it cost to fix B1185?

The estimated repair cost for B1185 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat