AutoCodes – Generic – B1720

B1720 Code - Seat Driver Forward Switch Circuit Short To Ground

Quick Answer

The Body Control Module (BCM) monitors the Seat Driver Forward Switch. Common causes include Faulty Seat Driver Forward Switch, Seat Driver Forward Switch harness is open or shorted, Seat Driver Forward 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: B1720 indicates Seat Driver Forward Switch Circuit Short To Ground.
Common causes: Common causes include Faulty Seat Driver Forward Switch, Seat Driver Forward Switch harness is open or shorted, Seat Driver Forward 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 5,999

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 B1720 Description

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

OBDII Code B1720 - Seat Driver Forward Switch Circuit Short To Ground - AutoCodes.com — B1720 Code - Seat Driver Forward Switch Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1720?

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

How to Fix the DTC B1720?

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 B1720 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 B1720 code?

Need more information on how to fix the B1720 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1720 code diagnosed by a professional: Find a repair shop in your area

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 B1720 Code

1. What are the common symptoms of OBDII code B1720 (Seat Driver Forward Switch Circuit Short To Ground)?

Symptoms may include non-functional power seat adjustments, the seat being stuck in one position, or intermittent power seat operation.

2. What are the possible causes of OBDII code B1720?

Possible causes include a short circuit in the wiring of the driver's seat forward switch, a faulty seat switch, or a malfunctioning seat control module.

3. How can I diagnose the issue related to OBDII code B1720?

Diagnosis typically involves inspecting the wiring harness for any visible damage, testing the continuity of the switch circuit, and using a multimeter to check for short circuits.

4. Can I still drive my vehicle with OBDII code B1720 present?

It is generally safe to drive the vehicle with this code, but the power seat adjustments may not work correctly, potentially causing discomfort while driving.

5. How can I repair OBDII code B1720 (Seat Driver Forward Switch Circuit Short To Ground)?

Repair usually involves repairing or replacing damaged wiring, replacing the faulty seat switch, or reprogramming the seat control module if necessary.

6. Is it possible to reset OBDII code B1720 without fixing the underlying issue?

Resetting the code without addressing the root cause will likely result in it reappearing once the malfunction is detected during the next system check.

7. Can a DIY enthusiast fix OBDII code B1720 at home?

Depending on the level of expertise, DIY enthusiasts may be able to diagnose and repair this issue at home by following repair guides and using the necessary tools.

8. Are there any preventive measures to avoid OBDII code B1720 in the future?

Regularly inspecting the seat switch wiring, avoiding spilling liquids on the power seat controls, and ensuring proper maintenance can help prevent this issue from occurring.

9. How long does it typically take to repair OBDII code B1720?

The repair time can vary depending on the exact cause of the issue, but it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.

10. Will fixing OBDII code B1720 require a visit to a dealership or can it be done at an independent mechanic?

This repair can generally be performed at an independent mechanic's shop or by a skilled DIY enthusiast, as it does not typically require specialized dealership equipment.