OBD Guide
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B1726

Seat Driver Rear Up Switch Circuit Open

B1726 is an OBD-II diagnostic trouble code meaning: Seat Driver Rear Up Switch Circuit Open. Common causes: switch wiring harness break, faulty seat up switch. Estimated repair cost: $6–33.

Severity
✅ Low
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–33 (est.)

Symptoms

  • Driver's side rear seat lift does not work
  • Seat system fault indicator flashes
  • The fault persists after restarting the engine

Causes

  • Switch wiring harness break
  • Faulty seat up switch
  • Poor contact in switch connector
  • Damage to wires due to corrosion or mechanical stress

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Inspect the switch connector for oxidation or poor contact.
  3. Check the serviceability of the seat lift switch
  4. If necessary, replace the switch or damaged wires
  5. Clean the connector contacts if they are oxidized

Related codes

B1725B1727B1728

FAQ

What does the B1726 code mean?

B1726 is an OBD-II diagnostic trouble code that indicates: Seat Driver Rear Up Switch Circuit Open

What causes a B1726 error code?

The most common causes of B1726 include: Switch wiring harness break; Faulty seat up switch; Poor contact in switch connector; Damage to wires due to corrosion or mechanical stress.

How do I fix a B1726 diagnostic trouble code?

To fix B1726: Check the wiring harness for breaks or damage. Inspect the switch connector for oxidation or poor contact.. Check the serviceability of the seat lift switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1726?

Limited driving only, diagnose soon

How much does it cost to fix B1726?

The estimated repair cost for B1726 is $6–33. Actual cost depends on your vehicle, location, and labor rates.

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