AutoCodes – GMC – C0542 2015 GMC Sierra

C0542 2015 GMC Sierra Code - Brake Pressure Sensor 2 Circuit Low

Quick Answer

The Electronic Brake Control Module uses inputs from the Electronic Brake Control Brake Pedal Position Sensor to determine when the brake is applied and how much force is used. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module 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: C0542 2015 GMC Sierra indicates Brake Pressure Sensor 2 Circuit Low.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module 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 220

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 Jul 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0542 2015 GMC Sierra Description

The Electronic Brake Control Module uses inputs from the Electronic Brake Control Brake Pedal Position Sensor to determine when the brake is applied and how much force is used. The Electronic Brake Control Module monitors when the driver's foot is on the brake and locks the offset. The offset is locked when three out of the four inputs indicate the brake pedal is applied. The four inputs are brake pedal travel 1, brake pedal travel 2, master cylinder pressure sensor, and brake pedal position sensor. These inputs are used to determine the driver's braking intent which is used to control the amount of pressure applied to the wheels.
Brake pressure sensor information is communicated from the Electronic Brake Control Module (EBCM) to the Hybrid Control Processor (HCP). This information is used to schedule regenerative braking and engine autostops.
The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detects a corrupted data message from the Electronic Brake Control Module.

OBDII Code C0542 2015 GMC Sierra - Brake Pressure Sensor 2 Circuit Low - AutoCodes.com — C0542 2015 GMC Sierra Code - Brake Pressure Sensor 2 Circuit Low

What does this mean?

What are the Possible Causes of the DTC C0542 2015 GMC Sierra?

Faulty Electronic Brake Control Module (EBCM)
Electronic Brake Control Module harness is open or shorted
Electronic Brake Control Module circuit poor electrical connection
Faulty Starter/Generator Control Module

How to Fix the DTC C0542 2015 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 C0542 2015 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 C0542 2015 GMC Sierra code?

Need more information on how to fix the C0542 2015 GMC Sierra code? Get Access to Factory Service Manuals

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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 C0542 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code C0542 in a 2015 GMC Sierra related to the Brake Pressure Sensor 2 Circuit Low?

- Common symptoms include the illumination of the ABS warning light on the dashboard, decreased brake performance, and potential issues with the vehicle's stability control system.

2. What could cause the OBDII code C0542 to trigger in a 2015 GMC Sierra?

- The code C0542 is typically triggered by a malfunction or low voltage in the brake pressure sensor 2 circuit. This can be caused by wiring issues, sensor failure, or problems with the ABS module.

3. How can I diagnose the root cause of OBDII code C0542 in my 2015 GMC Sierra?

- A thorough diagnostic process would involve checking the wiring harness for any damage, testing the brake pressure sensor 2 for proper functionality, and inspecting the ABS module for faults using a diagnostic scan tool.

4. Is it safe to continue driving my 2015 GMC Sierra with OBDII code C0542 related to the Brake Pressure Sensor 2 Circuit Low?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the ABS system and compromise overall brake performance and safety.

5. Can I reset the OBDII code C0542 in my 2015 GMC Sierra by simply clearing the fault codes?

- Clearing the fault codes may temporarily turn off the warning light, but if the underlying issue causing the code is not addressed, it is likely to reappear after driving the vehicle for some time.

6. How much does it typically cost to repair OBDII code C0542 in a 2015 GMC Sierra?

- The cost of repairing this code can vary depending on the root cause of the issue. It could range from a simple sensor replacement, which may cost a few hundred dollars, to more complex wiring or module repairs that could be more expensive.

7. Are there any DIY repair tips for fixing OBDII code C0542 in a 2015 GMC Sierra?

- DIY repair may be possible for experienced individuals with the right tools. It's important to follow the vehicle's repair manual, use proper diagnostic equipment, and ensure safety precautions are taken when working on the ABS system.

8. Can a faulty brake pressure sensor 2 cause other issues in a 2015 GMC Sierra besides triggering OBDII code C0542?

- Yes, a malfunctioning brake pressure sensor 2 can lead to issues with the ABS system, stability control, and overall brake performance, potentially compromising the safety of the vehicle.

9. How long does it typically take to repair OBDII code C0542 related to the Brake Pressure Sensor 2 Circuit Low in a 2015 GMC Sierra?

- The repair time can vary based on the complexity of the issue. A straightforward sensor replacement may take a couple of hours, while more involved repairs could take longer, especially if diagnostic steps are needed.

10. Is it necessary to visit a dealership or can an independent mechanic handle the repair for OBDII code C0542 in a 2015 GMC Sierra?

- While a dealership may have specialized knowledge and access to manufacturer-specific tools, an experienced independent mechanic familiar with ABS systems should be able to diagnose and repair the issue related to code C0542 in a 2015 GMC Sierra.