AutoCodes – GMC – B2177 GMC

B2177 GMC Code - Power Seat Switch Circuit

Quick Answer

The seat adjuster switch signal circuits are supplied 12 volts through resistors within the Memory Seat Module. Common causes include Faulty Power Seat Switch, Power Seat Switch harness is open or shorted, Power Seat 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: B2177 GMC indicates Power Seat Switch Circuit.
Common causes: Common causes include Faulty Power Seat Switch, Power Seat Switch harness is open or shorted, Power Seat 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 668

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 Sep 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2177 GMC Description

The seat adjuster switch signal circuits are supplied 12 volts through resistors within the Memory Seat Module. When a seat adjuster switch is pressed the signal circuit is grounded. Closing the signal circuit to ground pulls the signal circuit voltage low indicating to the Memory Seat Module the switch status is active. The OBDII code is set when a seat adjuster switch input to the Memory Seat Module is active for more than 20 seconds.

OBDII Code B2177 GMC - Power Seat Switch Circuit - AutoCodes.com — B2177 GMC Code - Power Seat Switch Circuit

What does this mean?

What are the Possible Causes of the DTC B2177 GMC?

Faulty Power Seat Switch
Power Seat Switch harness is open or shorted
Power Seat Switch circuit poor electrical connection
Faulty Memory Seat Module

How to Fix the DTC B2177 GMC?

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 B2177 GMC 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.

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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 B2177 GMC Code

1. What are common symptoms of OBDII code B2177 GMC related to the Power Seat Switch Circuit?

- Common symptoms include non-functioning power seat controls, inability to adjust the seat position, or erratic seat movement.

2. What are the possible causes of OBDII code B2177 GMC for the Power Seat Switch Circuit?

- The code may be triggered by a faulty power seat switch, damaged wiring or connectors, a blown fuse, or a malfunctioning power seat control module.

3. How can I diagnose the issue related to OBDII code B2177 GMC for the Power Seat Switch Circuit?

- You can start by checking the power seat fuse, inspecting the wiring and connectors for any damage, and testing the power seat switch for proper functionality.

4. Can a DIY enthusiast repair OBDII code B2177 GMC for the Power Seat Switch Circuit?

- Depending on the underlying cause, some DIY repairs like replacing a faulty switch or fixing a loose connector may be possible. However, more complex issues may require professional intervention.

5. Is it safe to drive with OBDII code B2177 GMC triggered for the Power Seat Switch Circuit?

- It is generally safe to drive with this code, but you may have limited or no control over adjusting your power seat position until the issue is resolved.

6. How can I reset OBDII code B2177 GMC for the Power Seat Switch Circuit?

- You can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes. However, the code will likely return if the underlying issue is not fixed.

7. What are the potential repair costs associated with OBDII code B2177 GMC for the Power Seat Switch Circuit?

- Repair costs can vary depending on the cause of the issue, but they may range from a simple fuse replacement to more extensive repairs involving the power seat control module.

8. Are there any preventive measures to avoid triggering OBDII code B2177 GMC for the Power Seat Switch Circuit?

- Regularly inspecting and maintaining the power seat components, avoiding overloading the seat, and ensuring proper electrical connections can help prevent issues leading to this code.

9. Can a weak car battery cause OBDII code B2177 GMC to be triggered for the Power Seat Switch Circuit?

- A weak car battery can potentially cause electrical issues that may lead to this code being triggered. Ensuring a properly functioning battery is important for overall vehicle health.

10. Is it necessary to visit a dealership for repairs related to OBDII code B2177 GMC for the Power Seat Switch Circuit?

- While a dealership may have specialized knowledge and tools, independent automotive repair shops with experience in electrical systems can also effectively diagnose and repair the issue.