AutoCodes – Chevrolet – C0274 2018 Chevrolet Silverado

C0274 2018 Chevrolet Silverado Code - Isolation Valve High Temperature

Quick Answer

The solenoid valves are integral parts of the brake pressure modulator. Common causes include Faulty Electronic Brake Control Module (EBCM) with Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve harness is open or shorted, Brake Pressure Modulator Valve 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: C0274 2018 Chevrolet Silverado indicates Isolation Valve High Temperature.
Common causes: Common causes include Faulty Electronic Brake Control Module (EBCM) with Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve harness is open or shorted, Brake Pressure Modulator Valve 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 204

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0274 2018 Chevrolet Silverado Description

The solenoid valves are integral parts of the brake pressure modulator. The brake pressure modulator contains an isolation solenoid valve and a dump solenoid valve for each wheel. A traction/stability control supply solenoid valve and an isolation solenoid valve for each brake circuit. The solenoid valves are not engaged during normal system operation. When the ABS, the traction control, or the stability control operation is required the Electronic Brake Control Module (EBCM) turns the required solenoid ON. The Diagnostic Trouble Code (DTC) will be set due to the extended operation of the ABS, the traction control, or the stability control.

OBDII Code C0274 2018 Chevrolet Silverado - Isolation Valve High Temperature - AutoCodes.com — C0274 2018 Chevrolet Silverado Code - Isolation Valve High Temperature

What does this mean?

What are the Possible Causes of the DTC C0274 2018 Chevrolet Silverado?

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

How to Fix the DTC C0274 2018 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

If the C0274 code is combined with other codes, fix other codes first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0274 2018 Chevrolet Silverado 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 C0274 2018 Chevrolet Silverado code?

Need more information on how to fix the C0274 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0274 2018 Chevrolet Silverado 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 C0274 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code C0274 in a 2018 Chevrolet Silverado?

- Common symptoms include the illumination of the Check Engine Light, reduced braking performance, and potential overheating of the isolation valve.

2. What does the OBDII code C0274 on a 2018 Chevrolet Silverado indicate?

- OBDII code C0274 specifically points to an issue with the isolation valve high temperature in the vehicle's brake system.

3. What are the possible causes of OBDII code C0274 in a 2018 Chevrolet Silverado?

- Possible causes may include a faulty isolation valve, a malfunctioning brake fluid temperature sensor, or issues with the brake control module.

4. How can I diagnose the OBDII code C0274 in my 2018 Chevrolet Silverado?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the fault codes, inspecting the brake system components, and testing the isolation valve and related sensors.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code C0274?

- It is not recommended to continue driving the vehicle with this code present, as it can affect the braking performance and overall safety of the vehicle.

6. How can I repair OBDII code C0274 in my 2018 Chevrolet Silverado?

- Repairing this code may involve replacing the faulty isolation valve, addressing any issues with the brake fluid temperature sensor, or reprogramming the brake control module.

7. Are there any DIY tips for troubleshooting OBDII code C0274 in a 2018 Chevrolet Silverado?

- DIY tips may include checking the brake fluid level, inspecting the brake system for leaks or damage, and ensuring proper connections to the isolation valve.

8. How much does it cost to fix OBDII code C0274 in a 2018 Chevrolet Silverado?

- The cost of fixing this code can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can resetting the OBDII system clear code C0274 in a 2018 Chevrolet Silverado?

- Resetting the OBDII system may temporarily clear the code, but it is essential to diagnose and address the underlying issue to prevent the code from reappearing.

10. Is OBDII code C0274 a common issue in 2018 Chevrolet Silverado vehicles?

- While not extremely common, OBDII code C0274 related to the isolation valve high temperature can occur in 2018 Chevrolet Silverado trucks, especially as they age or if maintenance is neglected.