AutoCodes – Generic – B1709

B1709 Code - Seat Driver Front Up Switch Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Seat Driver Front Up Switch. Common causes include Faulty Seat Driver Front Up Switch, Seat Driver Front Up Switch harness is open or shorted, Seat Driver Front Up Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1709 indicates Seat Driver Front Up Switch Circuit Failure.
Common causes: Common causes include Faulty Seat Driver Front Up Switch, Seat Driver Front Up Switch harness is open or shorted, Seat Driver Front Up Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,206

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1709 Description

The Body Control Module (BCM) monitors the Seat Driver Front Up Switch. The BCM sets the OBDII code when the Seat Driver Front Up Switch is not to factory specifications.

OBDII Code B1709 - Seat Driver Front Up Switch Circuit Failure - AutoCodes.com — B1709 Code - Seat Driver Front Up Switch Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1709?

Faulty Seat Driver Front Up Switch
Seat Driver Front Up Switch harness is open or shorted
Seat Driver Front Up Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1709?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1709 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1709 code?

Need more information on how to fix the B1709 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1709 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1709 Hyundai — Passenger Buckle Pretensioner Short To Battery
B1709 KIA — Passenger Buckle Pretensioner Short To Battery
B1709 Nissan — Roof Open/Close Switch

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1709 Code

1. What does the OBDII code B1709 mean?

B1709 indicates a failure in the Seat Driver Front Up Switch Circuit, which controls the vertical adjustment of the driverâ€™s seat.

2. What are the common symptoms of the B1709 code?

Symptoms include the front-up adjustment of the driverâ€™s seat not functioning, intermittent seat movement, or complete failure of the seat adjustment system.

3. What causes the B1709 code to appear?

Common causes include a faulty seat adjustment switch, damaged wiring or connectors in the circuit, or a malfunctioning seat motor.

4. How can I diagnose the B1709 code?

Start by inspecting the seat adjustment switch, wiring, and connectors for damage or corrosion. Use a multimeter to test for continuity and check for power and ground to the circuit.

5. Can I still drive my car with the B1709 code?

Yes, you can still drive the car, but the driverâ€™s seat front-up adjustment will not work, potentially affecting comfort and driving ergonomics.

6. How do I fix the B1709 code?

Repairs may involve replacing a faulty seat adjustment switch, repairing damaged wiring, cleaning corroded connectors, or replacing the seat motor if itâ€™s defective.

7. How much does it cost to fix the B1709 code?

The cost varies depending on the root cause, but replacing a seat switch or repairing wiring typically costs between $100 and $300.

8. Can I clear the B1709 code without fixing the issue?

Clearing the code without addressing the underlying problem may temporarily remove the error, but the issue will likely return until repaired.

9. Is the B1709 code specific to certain car brands or models?

While it can appear in various vehicles, it is more commonly associated with specific manufacturers. Consult your vehicleâ€™s manual or service data for details.

10. Do I need a professional mechanic to fix the B1709 code?

If you're comfortable with electrical diagnostics and repairs, you may be able to fix it yourself. Otherwise, a professional mechanic is recommended for accurate diagnosis and repair.