OBD Guide
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B1C27

Left Side Seat Thorax Squib 1 Low

B1C27 is an OBD-II diagnostic trouble code meaning: Left Side Seat Thorax Squib 1 Low. Common causes: short circuit in the squib circuit, wiring harness damage. Estimated repair cost: $56–167.

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

Symptoms

  • The SRS light on the dashboard is on
  • Loss of functionality of the side airbag system
  • Restraint system error message

Causes

  • Short circuit in the squib circuit
  • Wiring harness damage
  • Squib malfunction
  • Contact corrosion
  • Problem with SRS control unit

How to Fix

  1. Diagnostics of the SRC system using a scanner
  2. Visual inspection of the wiring harness and contacts
  3. Checking the squib resistance
  4. Replacement of damaged components (if necessary)
  5. Resetting errors and checking the system

Related codes

B1C28B1000B1010

FAQ

What does the B1C27 code mean?

B1C27 is an OBD-II diagnostic trouble code that indicates: Left Side Seat Thorax Squib 1 Low

What causes a B1C27 error code?

The most common causes of B1C27 include: Short circuit in the squib circuit; Wiring harness damage; Squib malfunction; Contact corrosion.

How do I fix a B1C27 diagnostic trouble code?

To fix B1C27: Diagnostics of the SRC system using a scanner. Visual inspection of the wiring harness and contacts. Checking the squib resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1C27?

Do not drive — repair immediately

How much does it cost to fix B1C27?

The estimated repair cost for B1C27 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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