OBD Guide
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B1759

Seat Driver Rear Down Circuit Short To Battery

B1759 is an OBD-II diagnostic trouble code meaning: Seat Driver Rear Down Circuit Short To Battery. Common causes: frayed or damaged wiring harness under the seat, mechanical damage to the seat heating element. Estimated repair cost: $56–167.

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

Symptoms

  • The driver's rear seat heating does not work
  • Constant heating on (seat overheating)
  • Dashboard warning about comfort system malfunction
  • Possible blown heating circuit fuse

Causes

  • Frayed or damaged wiring harness under the seat
  • Mechanical damage to the seat heating element
  • Short circuit in the heating system connector
  • Malfunction of the comfort system control module
  • Incorrect previous seat installation or repair

How to Fix

  1. Read fault codes and freeze frame data to determine error conditions
  2. Visually inspect the wiring harness under the seat for damage or chafing.
  3. Check the heating system connectors for corrosion or contamination.
  4. Using a multimeter, test the circuit for a short to ground.
  5. If damage to the harness is detected, repair or replace the wiring section
  6. Clear diagnosed codes and perform a heater system performance test

Related codes

B1758B1760B1765

FAQ

What does the B1759 code mean?

B1759 is an OBD-II diagnostic trouble code that indicates: Seat Driver Rear Down Circuit Short To Battery

What causes a B1759 error code?

The most common causes of B1759 include: Frayed or damaged wiring harness under the seat; Mechanical damage to the seat heating element; Short circuit in the heating system connector; Malfunction of the comfort system control module.

How do I fix a B1759 diagnostic trouble code?

To fix B1759: Read fault codes and freeze frame data to determine error conditions. Visually inspect the wiring harness under the seat for damage or chafing.. Check the heating system connectors for corrosion or contamination.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1759?

Yes, but get it checked soon

How much does it cost to fix B1759?

The estimated repair cost for B1759 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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