AutoCodes – Generic – B27F1

B27F1 Code - Refrigerant Channel Switching 2 Way Type Valve

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Heat Pump Control Unit detects a malfunction of the Refrigerant Channel Switching 2 Way Type Valve control signal status, compared to the valve status of the control that is being judged. Common causes include Faulty Refrigerant Channel Switching 2 Way Type Valve, Refrigerant Channel Switching 2 Way Type Valve harness is open or shorted, Refrigerant Channel Switching 2 Way Type Valve 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: B27F1 indicates Refrigerant Channel Switching 2 Way Type Valve.
Common causes: Common causes include Faulty Refrigerant Channel Switching 2 Way Type Valve, Refrigerant Channel Switching 2 Way Type Valve harness is open or shorted, Refrigerant Channel Switching 2 Way Type Valve 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 446

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 Feb 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B27F1 Description

OBDII Code B27F1 - Refrigerant Channel Switching 2 Way Type Valve - AutoCodes.com — B27F1 Code - Refrigerant Channel Switching 2 Way Type Valve

What does this mean?

What are the Possible Causes of the DTC B27F1?

Faulty Refrigerant Channel Switching 2 Way Type Valve
Refrigerant Channel Switching 2 Way Type Valve harness is open or shorted
Refrigerant Channel Switching 2 Way Type Valve circuit poor electrical connection
Faulty Heat Pump Control Unit

How to Fix the DTC B27F1?

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 B27F1 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 B27F1 code?

Need more information on how to fix the B27F1 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27F1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B27F1 Infiniti — Refrigerant Channel Switching 2 Way Type Valve
B27F1 Nissan — Refrigerant Channel Switching 2 Way Type Valve

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 B27F1 Code

1. What does OBDII code B27F1 mean?

Code B27F1 indicates an issue with the Refrigerant Channel Switching 2 Way Type Valve, which controls refrigerant flow in the air conditioning system.

2. What are the common symptoms of a B27F1 code?

Symptoms may include reduced cooling performance, warm air blowing from the vents, or the air conditioning system failing to operate.

3. What causes the B27F1 code to appear?

Common causes include a faulty refrigerant switching valve, electrical issues like damaged wiring or connectors, or a malfunctioning HVAC control module.

4. Can I drive my car with a B27F1 code?

Yes, but the air conditioning system may not function properly. Prolonged operation without addressing the issue could strain other HVAC components.

5. How is the B27F1 code diagnosed?

A technician will check the valve's electrical connections, inspect wiring for damage, and test the operation of the refrigerant channel switching valve.

6. How do you fix a B27F1 code?

Repairs may involve replacing the refrigerant switching valve, repairing damaged wiring or connectors, or reprogramming the HVAC control module if needed.

7. How much does it cost to fix the B27F1 code?

Costs vary depending on the vehicle and the specific repair. Replacing the valve typically costs between $150 and $500, including parts and labor.

8. Can I clear the B27F1 code without repairing the issue?

Clearing the code without addressing the problem will only temporarily remove it, and the issue is likely to reoccur.

9. What tools are needed to troubleshoot the B27F1 code?

Diagnosing the code requires an OBDII scanner, multimeter for electrical testing, and potentially an HVAC system pressure gauge.

10. Can low refrigerant levels trigger a B27F1 code?

While low refrigerant levels may not directly cause this code, they can affect the overall performance of the HVAC system and exacerbate related issues.