AutoCodes – GMC – B269C GMC

B269C GMC Code - Heater Coolant Pump Control Circuit Low

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: B269C GMC indicates Heater Coolant Pump Control Circuit Low.
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 569

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 B269C 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 B269C GMC - Heater Coolant Pump Control Circuit Low - AutoCodes.com — B269C GMC Code - Heater Coolant Pump Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B269C 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 B269C 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 B269C 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 B269C GMC code?

Need more information on how to fix the B269C GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B269C GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B269C 2014 GMC Sierra — Heater Coolant Pump Control Circuit Low
B269C 2015 GMC Sierra — Heater Coolant Pump Control Circuit Low
B269C 2016 GMC Sierra — Heater Coolant Pump Control Circuit Low
B269C 2017 GMC Sierra — Heater Coolant Pump Control Circuit Low
B269C 2018 GMC Sierra — Heater Coolant Pump Control Circuit Low

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 B269C GMC Code

1. What are the common symptoms of OBDII code B269C GMC (Heater Coolant Pump Control Circuit Low)?

The common symptoms include the check engine light illuminating, poor heater performance, and potential overheating of the engine.

2. What can cause the OBDII code B269C GMC to appear?

This code can be triggered by issues such as a faulty heater coolant pump, damaged wiring or connectors in the control circuit, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the cause of OBDII code B269C GMC?

Diagnosis involves checking the heater coolant pump for proper operation, inspecting the wiring and connectors for damage, and testing the PCM for functionality using a diagnostic tool.

4. What are some repair tips for addressing OBDII code B269C GMC?

Repair tips include replacing a faulty heater coolant pump, repairing or replacing damaged wiring or connectors, and reprogramming or replacing the PCM if necessary.

5. Can I continue driving my vehicle with the OBDII code B269C GMC present?

It is not recommended to drive with this code active, as it can lead to poor heater performance and potential engine overheating, which may cause further damage.

6. Will resetting the OBDII code B269C GMC make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

7. How much does it typically cost to repair OBDII code B269C GMC?

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

8. Can a DIY enthusiast fix OBDII code B269C GMC at home?

Depending on the extent of the issue and the individual's mechanical skills, some DIY enthusiasts may be able to address this code at home by following repair guides and using the necessary tools.

9. How urgent is it to address OBDII code B269C GMC?

It is important to address this code promptly to prevent potential overheating of the engine and further damage to related components, which could result in costly repairs.

10. Is it necessary to visit a dealership for OBDII code B269C GMC repair?

While a dealership can provide specialized service, independent auto repair shops and skilled mechanics can also effectively diagnose and repair OBDII code B269C GMC, often at a lower cost.