OBD Guide
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B1674

Seat Driver Occupied Input Circuit Short To Battery

B1674 is an OBD-II diagnostic trouble code meaning: Seat Driver Occupied Input Circuit Short To Battery. Common causes: wiring harness damage, short circuit in occupancy sensor. Estimated repair cost: $56–167.

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

Symptoms

  • SRS (airbag) light is on
  • Restraint system inactive
  • Error B1674 in fault memory

Causes

  • Wiring harness damage
  • Short circuit in occupancy sensor
  • Contact corrosion
  • Problems with the SRS control unit

How to Fix

  1. Check the wiring harness under the seat for damage.
  2. Inspect the occupancy sensor contacts
  3. Check the resistance of the occupancy sensor
  4. Scan the SRS system for other errors
  5. If necessary, replace the sensor or repair the wiring harness

Related codes

B1670B1671B1672B1673

FAQ

What does the B1674 code mean?

B1674 is an OBD-II diagnostic trouble code that indicates: Seat Driver Occupied Input Circuit Short To Battery

What causes a B1674 error code?

The most common causes of B1674 include: Wiring harness damage; Short circuit in occupancy sensor; Contact corrosion; Problems with the SRS control unit.

How do I fix a B1674 diagnostic trouble code?

To fix B1674: Check the wiring harness under the seat for damage.. Inspect the occupancy sensor contacts. Check the resistance of the occupancy sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1674?

Do not drive — repair immediately

How much does it cost to fix B1674?

The estimated repair cost for B1674 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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