AutoCodes – GMC – B269A GMC

B269A GMC 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 GMC 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 1,205

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

What does this mean?

What are the Possible Causes of the DTC B269A GMC?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B269A 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.

Need more information about the B269A GMC code?

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

Need Help with the Code?

Get the B269A GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B269A 2014 GMC Sierra — Heater Coolant Pump Control Circuit Open
B269A 2015 GMC Sierra — Heater Coolant Pump Control Circuit Open
B269A 2016 GMC Sierra — Heater Coolant Pump Control Circuit Open
B269A 2017 GMC Sierra — Heater Coolant Pump Control Circuit Open
B269A 2018 GMC Sierra — Heater Coolant Pump Control Circuit Open

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 GMC Code

1. What are the common symptoms of OBDII code B269A GMC (Heater Coolant Pump Control Circuit Open)?

- Common symptoms include a lack of cabin heat, engine overheating, and a dashboard warning light indicating a cooling system issue.

2. What does the OBDII code B269A GMC indicate about the Heater Coolant Pump Control Circuit?

- This code indicates that there is an open circuit in the control system for the heater coolant pump.

3. What are the possible causes of the Heater Coolant Pump Control Circuit Open code?

- Possible causes include a faulty coolant pump, damaged wiring or connectors in the circuit, a malfunctioning control module, or a blown fuse related to the coolant pump.

4. How can I diagnose the source of the open circuit in the Heater Coolant Pump Control Circuit?

- Diagnostic steps may include checking the coolant pump for proper operation, inspecting wiring and connectors for damage, testing the control module, and verifying fuse integrity.

5. Can I drive my vehicle with the B269A GMC code present?

- It is not recommended to drive the vehicle with this code present, as it can lead to engine overheating and potential damage. It is best to address the issue promptly.

6. How can I repair the Heater Coolant Pump Control Circuit Open issue?

- Repairs may involve replacing the faulty coolant pump, repairing or replacing damaged wiring or connectors, resetting the control module, or replacing a blown fuse.

7. Is it possible to reset the OBDII code B269A GMC without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is essential to address the root cause of the problem to prevent further issues with the cooling system.

8. Can a DIY enthusiast fix the Heater Coolant Pump Control Circuit Open problem?

- Depending on your skill level and access to tools, you may be able to diagnose and repair this issue yourself. However, it is recommended to consult a professional mechanic for complex electrical repairs.

9. How much does it typically cost to repair the Heater Coolant Pump Control Circuit Open issue?

- Repair costs can vary depending on the specific cause of the problem, but expenses may include parts such as a coolant pump, wiring repairs, or a control module, as well as labor costs for the repair.

10. Will fixing the Heater Coolant Pump Control Circuit Open code improve my vehicle's performance?

- Yes, resolving this issue will help restore proper operation of the coolant system, prevent engine overheating, and maintain optimal performance and efficiency of your vehicle.