OBD Guide
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B1729

Seat Driver Rear Down Switch Circuit Failure

B1729 is an OBD-II diagnostic trouble code meaning: Seat Driver Rear Down Switch Circuit Failure. Common causes: open or short circuit in wiring harness, faulty seat adjustment switch. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–111 (est.)

Symptoms

  • Inability to adjust the rear of the driver's seat
  • Airbag light flashing
  • Seat position memory system malfunction

Causes

  • Open or short circuit in wiring harness
  • Faulty seat adjustment switch
  • Problems with contacts in connectors
  • Seat control module malfunction

How to Fix

  1. Check the integrity of the wiring harness to the switch
  2. Test the switch with a multimeter
  3. Clean and check contacts in connectors
  4. If necessary, replace the switch or control module

Related codes

B1728B1730B1731

FAQ

What does the B1729 code mean?

B1729 is an OBD-II diagnostic trouble code that indicates: Seat Driver Rear Down Switch Circuit Failure

What causes a B1729 error code?

The most common causes of B1729 include: Open or short circuit in wiring harness; Faulty seat adjustment switch; Problems with contacts in connectors; Seat control module malfunction.

How do I fix a B1729 diagnostic trouble code?

To fix B1729: Check the integrity of the wiring harness to the switch. Test the switch with a multimeter. Clean and check contacts in connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1729?

Do not drive — repair immediately

How much does it cost to fix B1729?

The estimated repair cost for B1729 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat