AutoCodes – GMC – C0273 2018 GMC Sierra

C0273 2018 GMC Sierra Code - Brake Fluid Level Switch Circuit

Quick Answer

The brake fluid level switch monitors the level of the brake fluid in the brake fluid reservoir. Common causes include Faulty Brake Fluid Level Switch, Brake Fluid Level Switch harness is open or shorted, Brake Fluid Level 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: C0273 2018 GMC Sierra indicates Brake Fluid Level Switch Circuit.
Common causes: Common causes include Faulty Brake Fluid Level Switch, Brake Fluid Level Switch harness is open or shorted, Brake Fluid Level 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 298

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 05, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0273 2018 GMC Sierra Description

The brake fluid level switch monitors the level of the brake fluid in the brake fluid reservoir. When the Electronic Brake Control Module (EBCM) sees the brake fluid level switch input open, the Diagnostic Trouble Code (DTC) is set.

OBDII Code C0273 2018 GMC Sierra - Brake Fluid Level Switch Circuit - AutoCodes.com — C0273 2018 GMC Sierra Code - Brake Fluid Level Switch Circuit

What does this mean?

What are the Possible Causes of the DTC C0273 2018 GMC Sierra?

Faulty Brake Fluid Level Switch
Brake Fluid Level Switch harness is open or shorted
Brake Fluid Level Switch circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C0273 2018 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 C0273 2018 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 C0273 2018 GMC Sierra code?

Need more information on how to fix the C0273 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0273 2018 GMC Sierra 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 C0273 2018 GMC Sierra Code

1. What does OBDII code C0273 for a 2018 GMC Sierra indicate?

The code C0273 indicates a problem with the Brake Fluid Level Switch Circuit in the vehicle.

2. What are the common symptoms of OBDII code C0273 in a 2018 GMC Sierra?

Common symptoms of code C0273 may include the illumination of the brake warning light on the dashboard and a potential loss of brake fluid.

3. What are the possible causes of OBDII code C0273 in a 2018 GMC Sierra?

Possible causes of code C0273 can include a faulty brake fluid level sensor, damaged wiring or connectors in the circuit, or a problem with the brake fluid reservoir.

4. How can I diagnose the issue related to OBDII code C0273 on my 2018 GMC Sierra?

Diagnosing code C0273 may involve visually inspecting the brake fluid level sensor and its wiring, testing the sensor's functionality, and checking the brake fluid level in the reservoir.

5. Can I continue driving my 2018 GMC Sierra with OBDII code C0273?

It is not recommended to drive the vehicle with an unresolved brake fluid level switch circuit issue, as it may compromise the safety and performance of the braking system.

6. How can I repair OBDII code C0273 on my 2018 GMC Sierra?

To repair code C0273, you may need to replace the faulty brake fluid level sensor, repair any damaged wiring or connectors, and ensure the brake fluid reservoir is functioning properly.

7. Does fixing OBDII code C0273 require professional assistance?

While some DIY enthusiasts may be able to address the issue, it is advisable to seek professional assistance, especially if you are not familiar with diagnosing and repairing automotive electrical systems.

8. Are there any preventive maintenance tips to avoid OBDII code C0273 in a 2018 GMC Sierra?

Regularly checking the brake fluid level, maintaining the brake system components, and addressing any warning lights promptly can help prevent issues like code C0273 from occurring.

9. Can a low brake fluid level trigger OBDII code C0273 in a 2018 GMC Sierra?

Yes, a low brake fluid level can trigger code C0273, as the brake fluid level switch circuit is designed to monitor and alert the driver of any significant changes in brake fluid levels.

10. How long does it typically take to repair OBDII code C0273 on a 2018 GMC Sierra?

The repair time for code C0273 can vary depending on the root cause of the issue, the availability of replacement parts, and the expertise of the individual performing the repair.