AutoCodes – GMC – C0269 GMC

C0269 GMC Code - Excessive Dump/Isolation Time

Quick Answer

The Electronic Brake Control Module (EBCM) microprocessor grounds the dump coil to energize and close the dump valve. Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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: C0269 GMC indicates Excessive Dump/Isolation Time.
Common causes: Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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 8,267

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 May 02, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0269 GMC Description

The Electronic Brake Control Module (EBCM) microprocessor grounds the dump coil to energize and close the dump valve. This will release the excessive brake pressure which was applied by the driver to the wheels. If the EBCM microprocessor generates a dump command on one or more wheel for greater than nine seconds, the DTC will set.

OBDII Code C0269 GMC - Excessive Dump/Isolation Time - AutoCodes.com — C0269 GMC Code - Excessive Dump/Isolation Time

What does this mean?

What are the Possible Causes of the DTC C0269 GMC?

Faulty Brake Pressure Modulator Valve (BPMV)
Brake Pressure Modulator Valve (BPMV) harness is open or shorted
Brake Pressure Modulator Valve (BPMV) circuit poor electrical connection

How to Fix the DTC C0269 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 does this mean?

Code Tech Notes

If the C0269 code is combined with other codes, fix other codes first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0269 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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Need Help with the Code?

Get the C0269 GMC 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 C0269 GMC Code

1. What are the common symptoms of OBDII code C0269 in a GMC vehicle?

- Common symptoms include illuminated Check Engine light, rough idle, decreased fuel efficiency, and potential issues with the vehicle's stability control system.

2. What does OBDII code C0269 in a GMC indicate?

- This code indicates "Excessive Dump/Isolation Time," suggesting a problem with the vehicle's brake system pressure control module.

3. What are the possible causes of OBDII code C0269 in a GMC?

- Possible causes include a malfunctioning brake pressure modulator valve, damaged wiring or connectors, low brake fluid level, or a faulty brake pressure sensor.

4. How can I diagnose the cause of OBDII code C0269 in my GMC?

- Diagnosis typically involves checking the brake fluid level, inspecting the brake pressure modulator valve, testing the brake pressure sensor, and scanning the vehicle's electronic control unit for additional fault codes.

5. Can I continue driving my GMC with OBDII code C0269 present?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the vehicle's brake system and stability control.

6. How do I repair OBDII code C0269 in my GMC?

- Repair options may include replacing the faulty brake pressure modulator valve, repairing damaged wiring or connectors, topping up brake fluid, or replacing the brake pressure sensor as needed.

7. Will resetting the OBDII code C0269 make it go away permanently?

- Resetting the code may temporarily clear the Check Engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear.

8. Can a DIY enthusiast fix OBDII code C0269 in a GMC?

- Depending on their skill level and access to tools, a DIY enthusiast may be able to address some of the common causes of this code, such as checking and topping up brake fluid or inspecting wiring connections.

9. Is it necessary to visit a dealership for OBDII code C0269 repair in a GMC?

- While a dealership may have specialized equipment and expertise, independent mechanics or DIY enthusiasts with the right tools and knowledge can also effectively diagnose and repair this code.

10. How much does it typically cost to repair OBDII code C0269 in a GMC?

- Repair costs can vary depending on the specific cause of the code, but they may range from $200 to $600 or more, including parts and labor.