C0543 GMC Code - Brake Pressure Sensor 2 Circuit High
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
- C0543 GMC indicates Brake Pressure Sensor 2 Circuit High.
- 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.
Code C0543 GMC Description
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.
What are the Possible Causes of the DTC C0543 GMC?
- 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 C0543 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 C0543 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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Information for Specific GMC Models
- C0543 2014 GMC Sierra — Brake Pressure Sensor 2 Circuit High
- C0543 2015 GMC Sierra — Brake Pressure Sensor 2 Circuit High
- C0543 2016 GMC Sierra — Brake Pressure Sensor 2 Circuit High
- C0543 2017 GMC Sierra — Brake Pressure Sensor 2 Circuit High
- C0543 2018 GMC Sierra — Brake Pressure Sensor 2 Circuit High
Frequently Asked Questions about C0543 GMC Code
1. What are the common symptoms of OBDII code C0543 GMC (Brake Pressure Sensor 2 Circuit High)?
The common symptoms of OBDII code C0543 GMC include the ABS warning light illuminating on the dashboard, issues with the anti-lock braking system, and potential loss of braking performance.
2. What causes OBDII code C0543 GMC to trigger?
OBDII code C0543 GMC (Brake Pressure Sensor 2 Circuit High) is typically triggered by a malfunction in the brake pressure sensor 2 circuit, which can be caused by wiring issues, sensor failure, or problems with the brake control module.
3. How can I diagnose the cause of OBDII code C0543 GMC?
Diagnosing the cause of OBDII code C0543 GMC involves using a diagnostic scan tool to retrieve the specific fault code, checking the wiring and connections related to the brake pressure sensor 2, and testing the sensor itself for proper function.
4. Can I still drive my vehicle with OBDII code C0543 GMC active?
It is not recommended to drive your vehicle with OBDII code C0543 GMC active, as it indicates a potential issue with the brake pressure sensor that could compromise the effectiveness of the anti-lock braking system.
5. How can I repair OBDII code C0543 GMC?
Repairing OBDII code C0543 GMC involves addressing the root cause of the issue, which may include repairing or replacing damaged wiring, replacing the brake pressure sensor 2, or reprogramming the brake control module as needed.
6. Is it safe to continue driving if the ABS warning light is on due to OBDII code C0543 GMC?
It is not safe to continue driving if the ABS warning light is on due to OBDII code C0543 GMC, as it indicates a potential fault in the brake pressure sensor 2 circuit that could affect the proper functioning of the anti-lock braking system.
7. Can a DIYer fix OBDII code C0543 GMC at home?
While some DIYers may be able to diagnose and fix OBDII code C0543 GMC at home, it is recommended to have a professional technician perform the diagnosis and repair to ensure the issue is properly addressed.
8. How much does it cost to repair OBDII code C0543 GMC?
The cost to repair OBDII code C0543 GMC can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates of the repair shop. It's best to get a diagnosis and estimate from a qualified technician.
9. Will resetting the OBDII code C0543 GMC make the issue go away?
Resetting the OBDII code C0543 GMC may temporarily clear the fault code, but it will not fix the underlying issue causing the code to trigger. It's important to diagnose and repair the root cause of the problem to prevent it from recurring.
10. How urgent is it to address OBDII code C0543 GMC?
It is important to address OBDII code C0543 GMC in a timely manner, as it indicates a potential problem with the brake pressure sensor that could compromise the safety and performance of your vehicle's braking system.
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