AutoCodes – Hummer – C0273 Hummer

C0273 Hummer 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 Hummer 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 1,717

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 Hummer 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 Hummer - Brake Fluid Level Switch Circuit - AutoCodes.com — C0273 Hummer Code - Brake Fluid Level Switch Circuit

What does this mean?

What are the Possible Causes of the DTC C0273 Hummer?

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 Hummer?

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 Hummer 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 Hummer code?

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

Need Help with the 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 C0273 Hummer Code

1. What does OBDII code C0273 for a Hummer indicate?

The code C0273 on a Hummer indicates a problem with the Brake Fluid Level Switch Circuit.

2. What are the common symptoms of a C0273 OBDII code in a Hummer?

Common symptoms of the C0273 code may include the illumination of the brake warning light on the dashboard and potential issues with the brake fluid level monitoring system.

3. What are the possible causes of the C0273 OBDII code in a Hummer?

Possible causes of the C0273 code in a Hummer include a faulty brake fluid level switch, wiring issues in the circuit, or a problem with the brake fluid reservoir.

4. How can I diagnose the C0273 OBDII code in my Hummer?

Diagnosing the C0273 code involves checking the brake fluid level, inspecting the brake fluid level switch and its wiring, and testing the switch for proper operation using a multimeter.

5. How serious is the C0273 OBDII code in a Hummer?

While the C0273 code may not cause immediate safety concerns, it is still important to address the issue promptly to ensure the proper functioning of the brake fluid level monitoring system.

6. Can I drive my Hummer with a C0273 OBDII code?

It is generally not recommended to drive your Hummer with an unresolved C0273 code, as it may affect the accuracy of the brake fluid level monitoring system, potentially leading to unsafe driving conditions.

7. How can I repair the C0273 OBDII code in my Hummer?

Repairing the C0273 code may involve replacing the brake fluid level switch, repairing any damaged wiring, or addressing any issues with the brake fluid reservoir to ensure proper functionality of the system.

8. Will resetting the OBDII system clear the C0273 code in my Hummer?

Resetting the OBDII system may temporarily clear the C0273 code, but if the underlying issue is not addressed, the code is likely to reappear upon further diagnosis or driving.

9. Can a DIY enthusiast fix the C0273 OBDII code in a Hummer?

Depending on their skill level and access to tools, a DIY enthusiast may be able to address the C0273 code by following repair guides and procedures specific to their Hummer model.

10. How much does it cost to repair the C0273 OBDII code in a Hummer?

The cost of repairing the C0273 code in a Hummer can vary depending on the specific cause of the issue, parts needed for replacement, and whether the repair is done at a dealership or by a mechanic.