AutoCodes – GMC – B269D 2018 GMC Sierra

B269D 2018 GMC Sierra Code - Heater Coolant Pump Control Circuit High

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: B269D 2018 GMC Sierra indicates Heater Coolant Pump Control Circuit High.
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 169

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 B269D 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 B269D 2018 GMC Sierra - Heater Coolant Pump Control Circuit High - AutoCodes.com — B269D 2018 GMC Sierra Code - Heater Coolant Pump Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B269D 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 B269D 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 B269D 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 B269D 2018 GMC Sierra code?

Need more information on how to fix the B269D 2018 GMC Sierra 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 B269D 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code B269D in a 2018 GMC Sierra related to the Heater Coolant Pump Control Circuit High?

The common symptoms include the heater not working properly, overheating of the engine, and possible illumination of the check engine light.

2. What are the possible causes of OBDII code B269D in a 2018 GMC Sierra?

Possible causes include a malfunctioning heater coolant pump, a faulty coolant pump control module, wiring issues, or a poor electrical connection.

3. How can I diagnose the OBDII code B269D in my 2018 GMC Sierra?

Diagnosing this code typically involves using a scan tool to read the code, checking the coolant pump and its connections, inspecting the wiring harness for any damage, and testing the coolant pump control module.

4. Can I continue driving my 2018 GMC Sierra with OBDII code B269D?

It is not recommended to continue driving your vehicle with this code as it can lead to potential engine overheating and further damage to the cooling system.

5. How can I repair OBDII code B269D in my 2018 GMC Sierra?

Repairing this code usually involves replacing the faulty heater coolant pump, repairing any damaged wiring or connectors, or replacing the coolant pump control module if necessary.

6. Will resetting the check engine light resolve OBDII code B269D in a 2018 GMC Sierra?

Simply resetting the check engine light will not fix the underlying issue causing the code. It is important to diagnose and repair the root cause of the problem.

7. Is it safe to continue using the heater in my 2018 GMC Sierra with OBDII code B269D?

It is not recommended to use the heater in your vehicle if you suspect an issue with the heater coolant pump circuit to prevent any further damage or overheating.

8. How can I prevent OBDII code B269D from appearing in my 2018 GMC Sierra in the future?

Regular maintenance checks, including inspecting the cooling system components and addressing any issues promptly, can help prevent this code from reoccurring.

9. Can a DIY enthusiast repair OBDII code B269D in a 2018 GMC Sierra?

While some individuals may have the skills to diagnose and repair this code themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure safety and effectiveness.

10. How much does it cost to repair OBDII code B269D in a 2018 GMC Sierra?

The cost of repairing this code can vary depending on the extent of the issue, parts needed, and labor costs. It is advisable to obtain quotes from different repair shops for an accurate estimate.