AutoCodes – Generic – B14A5

B14A5 Code - Refrigerant Flow Sensor Circuit Open

Quick Answer

The Air Condition (A/C) Control Module monitors the Refrigerant Flow Sensor. Common causes include Faulty Refrigerant Flow Sensor, Refrigerant Flow Sensor harness is open or shorted, Refrigerant Flow Sensor 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: B14A5 indicates Refrigerant Flow Sensor Circuit Open.
Common causes: Common causes include Faulty Refrigerant Flow Sensor, Refrigerant Flow Sensor harness is open or shorted, Refrigerant Flow Sensor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,317

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 Apr 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B14A5 Description

The Air Condition (A/C) Control Module monitors the Refrigerant Flow Sensor. The A/C Control Module sets the OBDII code when the Refrigerant Flow Sensor is not to factory specifications.

OBDII Code B14A5 - Refrigerant Flow Sensor Circuit Open - AutoCodes.com — B14A5 Code - Refrigerant Flow Sensor Circuit Open

What does this mean?

What are the Possible Causes of the DTC B14A5?

Faulty Refrigerant Flow Sensor
Refrigerant Flow Sensor harness is open or shorted
Refrigerant Flow Sensor circuit poor electrical connection
Faulty Air Condition (A/C) Control Module

How to Fix the DTC B14A5?

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 B14A5 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 B14A5 code?

Need more information on how to fix the B14A5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B14A5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B14A5 Scion — Refrigerant Flow Sensor Circuit Open
B14A5 Subaru — Refrigerant Flow Sensor 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 B14A5 Code

1. What are the common symptoms of OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open)?

The common symptoms include the air conditioning system not cooling effectively, the AC compressor not engaging, and the AC system blowing warm air.

2. What can cause the OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open) to trigger?

The code can be triggered by a faulty refrigerant flow sensor, a damaged wiring harness, loose connections, or a blown fuse related to the sensor circuit.

3. How can I diagnose the cause of OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open)?

You can use a multimeter to check the continuity of the wiring harness, inspect the sensor for physical damage, and verify the connections for any corrosion or looseness.

4. Can I drive my vehicle with OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open) present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the air conditioning system and affect the overall performance of the vehicle.

5. How can I repair OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open)?

You can repair the code by replacing the faulty refrigerant flow sensor, repairing any damaged wiring, ensuring all connections are secure, and resetting the trouble codes using an OBDII scanner.

6. Are there any preventive maintenance tips to avoid OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open)?

Regularly servicing your vehicle's air conditioning system, checking for refrigerant leaks, and inspecting the sensor and wiring during routine maintenance can help prevent this code from occurring.

7. Can a DIY enthusiast fix OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open) at home?

While some experienced DIY enthusiasts may be able to diagnose and repair this code at home, it is recommended to seek professional help, especially when dealing with the air conditioning system.

8. What is the typical cost to repair OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open)?

The cost of repairing this code can vary depending on the extent of the damage and the labor rates in your area. It is advisable to get quotes from different auto repair shops for an accurate estimate.

9. Will OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open) affect the vehicle's fuel efficiency?

Yes, if the air conditioning system is not functioning properly due to this code, it can lead to increased fuel consumption as the engine works harder to compensate for the lack of cooling efficiency.

10. How urgent is it to address OBDII code B14A5 (Refrigerant Flow Sensor Circuit Open)?

It is recommended to address this code as soon as possible to prevent further damage to the air conditioning system and ensure the comfort and safety of the vehicle occupants, especially in hot weather conditions.