OBD Guide
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B1720

Seat Driver Forward Switch Circuit Short To Ground

B1720 is an OBD-II diagnostic trouble code meaning: Seat Driver Forward Switch Circuit Short To Ground. Common causes: wiring harness damage, front seat position switch malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Driver's seat front adjustment malfunction
  • The seat does not move forward
  • The malfunction indicator on the dashboard lights up

Causes

  • Wiring harness damage
  • Front seat position switch malfunction
  • Poor ground connection
  • Problems with the seat control unit

How to Fix

  1. Check wiring harness for damage
  2. Check the condition of the front seat position switch
  3. Check ground connection
  4. If necessary, replace the switch or wiring harness
  5. Check the operation of the seat control unit

Related codes

B1710B1715B1725

FAQ

What does the B1720 code mean?

B1720 is an OBD-II diagnostic trouble code that indicates: Seat Driver Forward Switch Circuit Short To Ground

What causes a B1720 error code?

The most common causes of B1720 include: Wiring harness damage; Front seat position switch malfunction; Poor ground connection; Problems with the seat control unit.

How do I fix a B1720 diagnostic trouble code?

To fix B1720: Check wiring harness for damage. Check the condition of the front seat position switch. Check ground connection. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1720?

Limited driving only, diagnose soon

How much does it cost to fix B1720?

The estimated repair cost for B1720 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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