OBD Guide
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B2691

Left Seat Belt Switch Circuit Fault

B2691 is an OBD-II diagnostic trouble code meaning: Left Seat Belt Switch Circuit Fault. Common causes: seat belt switch circuit open, short circuit in the circuit. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Airbag light on
  • Incorrect operation of the seat belt indicator
  • Error B2691 in diagnostic scanner memory

Causes

  • Seat belt switch circuit open
  • Short circuit in the circuit
  • Faulty seat belt switch
  • Damaged wiring harness
  • Connection problems or corrosion

How to Fix

  1. Diagnose the SRS system using a scanner
  2. Visually inspect the wiring harness and connections for damage.
  3. Check the operation of the seat belt switch manually
  4. Test the switch circuit with a multimeter
  5. If necessary, replace the switch or repair damaged wiring

Related codes

B2690B2692

FAQ

What does the B2691 code mean?

B2691 is an OBD-II diagnostic trouble code that indicates: Left Seat Belt Switch Circuit Fault

What causes a B2691 error code?

The most common causes of B2691 include: Seat belt switch circuit open; Short circuit in the circuit; Faulty seat belt switch; Damaged wiring harness.

How do I fix a B2691 diagnostic trouble code?

To fix B2691: Diagnose the SRS system using a scanner. Visually inspect the wiring harness and connections for damage.. Check the operation of the seat belt switch manually. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2691?

Do not drive — repair immediately

How much does it cost to fix B2691?

The estimated repair cost for B2691 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat