AutoCodes – GMC – B269A 2018 GMC Sierra

B269A 2018 GMC Sierra Code - Heater Coolant Pump Control Circuit Open

Quick Answer

The coolant heater pump is controlled by a relay. Common causes include Faulty Heater Coolant Pump, Heater Coolant Pump harness is open or shorted, Heater Coolant Pump 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: B269A 2018 GMC Sierra indicates Heater Coolant Pump Control Circuit Open.
Common causes: Common causes include Faulty Heater Coolant Pump, Heater Coolant Pump harness is open or shorted, Heater Coolant Pump 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 199

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 29, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B269A 2018 GMC Sierra Description

The coolant heater pump is controlled by a relay. When operating conditions exist that require coolant flow when the engine is not operating, the Heating, Ventilation, and Air Conditioning (HVAC) control module turns ON the heater coolant pump by applying ground to the relay control circuit which energizes the heater coolant pump relay.

OBDII Code B269A 2018 GMC Sierra - Heater Coolant Pump Control Circuit Open - AutoCodes.com — B269A 2018 GMC Sierra Code - Heater Coolant Pump Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC B269A 2018 GMC Sierra?

Faulty Heater Coolant Pump
Heater Coolant Pump harness is open or shorted
Heater Coolant Pump circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC B269A 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 B269A 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 B269A 2018 GMC Sierra code?

Need more information on how to fix the B269A 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B269A 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 B269A 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B269A in a 2018 GMC Sierra related to the Heater Coolant Pump Control Circuit Open?

The common symptoms include issues with the heating system, such as lack of heat in the cabin or inconsistent temperature control.

2. What can cause the OBDII code B269A in a 2018 GMC Sierra to trigger?

The code B269A typically triggers when there is an open circuit in the heater coolant pump control circuit, which can be caused by a faulty pump, damaged wiring, or a failed control module.

3. How can I diagnose the Heater Coolant Pump Control Circuit Open issue in my 2018 GMC Sierra?

Diagnosing the issue involves checking the heater coolant pump, inspecting the wiring for any damage, and testing the control module for proper functionality using a diagnostic tool.

4. Can I drive my 2018 GMC Sierra with the OBDII code B269A present?

It is not recommended to drive the vehicle with the B269A code active, as it can lead to further damage to the heating system and affect the overall performance of the vehicle.

5. What are some repair tips for addressing the Heater Coolant Pump Control Circuit Open issue in a 2018 GMC Sierra?

Repair tips include checking and replacing the heater coolant pump, repairing any damaged wiring, and resetting the control module after fixing the open circuit.

6. Will resetting the OBDII code B269A in my 2018 GMC Sierra fix the issue?

Resetting the code may temporarily clear the error, but it is essential to address the root cause of the problem, such as fixing the open circuit in the heater coolant pump control circuit.

7. How much does it cost to repair the Heater Coolant Pump Control Circuit Open issue in a 2018 GMC Sierra?

The cost of repairing the issue can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix the OBDII code B269A in a 2018 GMC Sierra?

While some DIY enthusiasts may have the skills to diagnose and repair the issue, it is recommended to seek help from a professional mechanic, especially when dealing with electrical components like the heater coolant pump control circuit.

9. What are the long-term effects of ignoring the OBDII code B269A in a 2018 GMC Sierra?

Ignoring the B269A code can lead to further damage to the heating system, reduced comfort in the cabin, and potential overheating issues, which can impact the overall performance and safety of the vehicle.

10. Is the OBDII code B269A specific to 2018 GMC Sierra vehicles only?

The B269A code related to the Heater Coolant Pump Control Circuit Open can be specific to certain GMC Sierra models, but similar issues may occur in other vehicles with a similar heating system design.