OBD Guide
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B2074

Driver Side Seat Belt Buckle Switch Circuit Malfunction

B2074 is an OBD-II diagnostic trouble code meaning: Driver Side Seat Belt Buckle Switch Circuit Malfunction. Common causes: open or shorted wiring harness, poor contact in connectors. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • The SRS system may not recognize that the seat belt is fastened.
  • The seat belt warning signal may not work correctly

Causes

  • Open or shorted wiring harness
  • Poor contact in connectors
  • Seat belt buckle switch malfunction
  • Damage to the SRS control unit

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check the contacts in the connectors of the switch and control unit
  3. Replace the seat belt buckle switch if necessary
  4. Check the operation of the SRS system after repair

Related codes

B2075B2076B2077

FAQ

What does the B2074 code mean?

B2074 is an OBD-II diagnostic trouble code that indicates: Driver Side Seat Belt Buckle Switch Circuit Malfunction

What causes a B2074 error code?

The most common causes of B2074 include: Open or shorted wiring harness; Poor contact in connectors; Seat belt buckle switch malfunction; Damage to the SRS control unit.

How do I fix a B2074 diagnostic trouble code?

To fix B2074: Check the wiring harness for breaks or damage. Check the contacts in the connectors of the switch and control unit. Replace the seat belt buckle switch if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2074?

Do not drive — repair immediately

How much does it cost to fix B2074?

The estimated repair cost for B2074 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat