AutoCodes – GMC – C0161 2017 GMC Sierra

C0161 2017 GMC Sierra Code - Antilock Braking System Brake Switch Circuit

Quick Answer

When the brake pedal is applied, the Body Control Module (BCM) sends a serial data message to the Electronic Brake Control Module (EBCM) in reference to the brake pedal positions. Common causes include Faulty Brake Switch (Stop Lamp Switch), Brake Switch harness is open or shorted, Brake 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: C0161 2017 GMC Sierra indicates Antilock Braking System Brake Switch Circuit.
Common causes: Common causes include Faulty Brake Switch (Stop Lamp Switch), Brake Switch harness is open or shorted, Brake 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 196

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 20, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0161 2017 GMC Sierra Description

When the brake pedal is applied, the Body Control Module (BCM) sends a serial data message to the Electronic Brake Control Module (EBCM) in reference to the brake pedal positions. The Electronic Brake Control Module compares the correlation between the brake pedal position and the amount of brake pressure it senses from the brake pressure sensor, which is internal to the brake pressure modulator. It uses this information to control the vehicle during an electronic stability control event. The Diagnostic Trouble Code (DTC) will be set when the Electronic Brake Control Module detects the vehicle speed is greater than 16 km/h (10 MPH), the brake pedal is applied for 122 s, and the brake pressure is less than 620 kPa (90 psi).

OBDII Code C0161 2017 GMC Sierra - Antilock Braking System Brake Switch Circuit - AutoCodes.com — C0161 2017 GMC Sierra Code - Antilock Braking System Brake Switch Circuit

What does this mean?

What are the Possible Causes of the DTC C0161 2017 GMC Sierra?

Faulty Brake Switch (Stop Lamp Switch)
Brake Switch harness is open or shorted
Brake Switch circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM) with Brake Pressure Modulator Valve (BPMV)

How to Fix the DTC C0161 2017 GMC Sierra?

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 C0161 2017 GMC Sierra 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 C0161 2017 GMC Sierra code?

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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 C0161 2017 GMC Sierra Code

1. What does OBDII code C0161 for a 2017 GMC Sierra mean?

Code C0161 indicates an issue with the Antilock Braking System (ABS) Brake Switch Circuit in your vehicle.

2. What are the common symptoms of OBDII code C0161 in a GMC Sierra?

Common symptoms include the ABS warning light being illuminated on the dashboard, potential loss of ABS functionality, and difficulty engaging the brakes.

3. What are the possible causes of OBDII code C0161 in a 2017 GMC Sierra?

Potential causes of code C0161 include a faulty brake switch, damaged wiring or connectors in the brake switch circuit, or issues with the ABS control module.

4. How can I diagnose the cause of OBDII code C0161 in my GMC Sierra?

Diagnosing the issue may involve checking the brake switch for proper operation, inspecting the wiring and connectors for damage, and using a diagnostic tool to scan the ABS system for specific faults.

5. Can I still drive my GMC Sierra with OBDII code C0161 present?

It is not recommended to drive your vehicle with an active ABS-related fault code like C0161, as it may affect the proper functioning of the Antilock Braking System and compromise braking performance.

6. How can I repair OBDII code C0161 in my 2017 GMC Sierra?

Repairing code C0161 may involve replacing a faulty brake switch, repairing damaged wiring or connectors, or addressing any underlying issues with the ABS control module.

7. Is it safe to reset the OBDII code C0161 in my GMC Sierra using a scanner?

While clearing the fault code may temporarily turn off the warning light, it is crucial to address the root cause of the issue to prevent it from reoccurring and ensure the proper functioning of the ABS system.

8. Can a DIY enthusiast fix OBDII code C0161 in a GMC Sierra?

Depending on your skill level and access to tools, some aspects of diagnosing and repairing code C0161 may be manageable for a DIY enthusiast, especially if the issue is related to the brake switch or wiring.

9. How much does it cost to repair OBDII code C0161 in a 2017 GMC Sierra at a dealership or repair shop?

The cost of repairing code C0161 can vary based on the specific cause of the issue, but it may involve diagnostic fees, parts costs for replacement components, and labor charges for the repair work.

10. How often does OBDII code C0161 occur in a 2017 GMC Sierra?

The occurrence of code C0161 can vary from vehicle to vehicle, but it is a relatively common ABS-related fault code that may be encountered in a 2017 GMC Sierra due to issues with the brake switch circuit.