AutoCodes – Generic – B269C

B269C 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 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 3,101

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

What does this mean?

What are the Possible Causes of the DTC B269C?

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

B269C Buick — Heater Coolant Pump Control Circuit Low
B269C Cadillac — Heater Coolant Pump Control Circuit Low
B269C Chevrolet — Heater Coolant Pump Control Circuit Low
B269C GMC — 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 Code

1. What does OBDII code B269C mean?

Code B269C indicates a low signal or malfunction in the heater coolant pump control circuit, which impacts the operation of the pump responsible for circulating coolant to the heater core.

2. What are the common symptoms of code B269C?

Symptoms may include insufficient cabin heating, reduced defrosting performance, fluctuating engine temperature, or activation of the check engine or warning light.

3. What causes the B269C code to appear?

Common causes include a failed heater coolant pump, damaged wiring or connectors in the control circuit, a faulty relay, or issues with the vehicleâ€™s control module.

4. Can I still drive my car with the B269C code?

You may be able to drive, but lack of adequate heating or potential cooling system issues could lead to discomfort or overheating risks. Prompt diagnosis and repair are recommended.

5. How do I diagnose the B269C code?

Using a diagnostic tool, check for related codes and inspect the heater coolant pump, wiring, connectors, and control circuit for damage or electrical faults.

6. How is the B269C code fixed?

Repairs may involve replacing the heater coolant pump, fixing damaged wiring or connectors, replacing a faulty relay, or reprogramming the control module if necessary.

7. Can a low coolant level cause the B269C code?

Low coolant levels generally do not directly cause this code but can lead to heater coolant pump inefficiency, which might trigger related issues in the system.

8. Does replacing the heater coolant pump fix the B269C code?

If the pump is faulty, replacing it often resolves the issue. However, you should also inspect the wiring, connectors, and control circuit to ensure there are no underlying problems.

9. Is the B269C code specific to certain vehicles?

While the code may appear in various makes and models, its exact symptoms and repairs can vary depending on the vehicle's design and heater system layout.

10. How much does it cost to repair the B269C code?

Repair costs can range from $150 to $500, depending on whether the heater coolant pump, wiring, or other components need replacement.