OBD Guide
ENFRDEESPT

B1740

Driver Seat Front Down Switch Circuit

B1740 is an OBD-II diagnostic trouble code meaning: Driver Seat Front Down Switch Circuit. Common causes: open or short circuit in wiring harness, front lower switch malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Driver's front seat lowering does not work
  • Seat control indicator flashing
  • Seat does not respond to switch commands

Causes

  • Open or short circuit in wiring harness
  • Front lower switch malfunction
  • Problems with the seat control module
  • Oxidation of contacts

How to Fix

  1. Check the integrity of the wiring harness
  2. Test the front lower switch
  3. Clean or replace oxidized contacts
  4. Replace switch if necessary
  5. Check seat control module

Related codes

B1741B1742B1743

FAQ

What does the B1740 code mean?

B1740 is an OBD-II diagnostic trouble code that indicates: Driver Seat Front Down Switch Circuit

What causes a B1740 error code?

The most common causes of B1740 include: Open or short circuit in wiring harness; Front lower switch malfunction; Problems with the seat control module; Oxidation of contacts.

How do I fix a B1740 diagnostic trouble code?

To fix B1740: Check the integrity of the wiring harness. Test the front lower switch. Clean or replace oxidized contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1740?

Yes, but get it checked soon

How much does it cost to fix B1740?

The estimated repair cost for B1740 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat