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B27C7 Infiniti Code - Compressor Discharge Refrigerant Temperature Sensor High

Quick Answer

The B27C7 diagnostic trouble code (DTC) indicates a high signal from the compressor discharge refrigerant temperature sensor in Infiniti vehicles. Common causes include Faulty Temperature Sensor: The sensor itself may be malfunctioning, providing inaccurate readings to the ECM, Low Refrigerant Levels: Insufficient refrigerant can cause the compressor to overheat, triggering the code, Compressor Failure: A failing compressor may not circulate refrigerant properly, leading to high discharge temperatures. 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
B27C7 Infiniti indicates Compressor Discharge Refrigerant Temperature Sensor High.
Common causes
Common causes include Faulty Temperature Sensor: The sensor itself may be malfunctioning, providing inaccurate readings to the ECM, Low Refrigerant Levels: Insufficient refrigerant can cause the compressor to overheat, triggering the code, Compressor Failure: A failing compressor may not circulate refrigerant properly, leading to high discharge temperatures.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 23, 2024
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Code B27C7 Infiniti Description

The B27C7 diagnostic trouble code (DTC) indicates a high signal from the compressor discharge refrigerant temperature sensor in Infiniti vehicles. This sensor plays a critical role in the climate control system by monitoring the temperature of the refrigerant as it exits the compressor. A high temperature reading can suggest that the refrigerant is overheating, which may lead to inefficient cooling performance or even damage to the air conditioning (A/C) system components.

OBDII Code B27C7 Infiniti - Compressor Discharge Refrigerant Temperature Sensor High
B27C7 Infiniti Code - Compressor Discharge Refrigerant Temperature Sensor High

Common Causes of B27C7 Infiniti

  1. Faulty Temperature Sensor: The sensor itself may be malfunctioning, providing inaccurate readings to the ECM.
  2. Low Refrigerant Levels: Insufficient refrigerant can cause the compressor to overheat, triggering the code.
  3. Compressor Failure: A failing compressor may not circulate refrigerant properly, leading to high discharge temperatures.
  4. Blocked Refrigerant Lines: Obstructions in the refrigerant lines can restrict flow, causing overheating in the system.
  5. Electrical Issues: Wiring problems, such as shorts or corrosion, can affect the sensor's performance and lead to false readings.

Symptoms of B27C7 Infiniti

  1. Reduced A/C Performance: The air conditioning system may not cool the cabin effectively, leading to discomfort.
  2. Compressor Noise: Unusual noises from the A/C compressor may indicate internal damage or malfunction.
  3. Increased Engine Load: The engine may experience increased load due to the compressor working harder than normal.
  4. A/C System Cycling: The A/C system may frequently cycle on and off, indicating that the system is trying to regulate temperature but failing to do so.
  5. Warning Lights: The check engine light or A/C warning light may illuminate on the dashboard, indicating a fault in the system.

How to Fix B27C7 Infiniti

  1. Diagnostic Scan: Begin with a comprehensive diagnostic scan to confirm the B27C7 code and check for any additional codes that may provide insight into the issue.
  2. Inspect the Temperature Sensor: Check the compressor discharge refrigerant temperature sensor for proper operation and replace it if it is faulty.
  3. Check Refrigerant Levels: Inspect the A/C system for refrigerant leaks and recharge the system to the manufacturer’s specifications if levels are low.
  4. Examine the Compressor: Assess the A/C compressor for signs of wear or damage, and replace it if necessary.
  5. Inspect Refrigerant Lines: Check for blockages or kinks in the refrigerant lines, and clear any obstructions found.

Cost to Fix B27C7 Infiniti

The cost to repair the B27C7 code can vary significantly based on the specific issue identified during diagnosis. On average, repairs may range from $200 to $1,200. This estimate includes parts such as the temperature sensor (approximately $50 to $150) and labor costs, which can vary widely. Labor rates typically range from $80 to $150 per hour, depending on the location and type of repair shop. In metropolitan areas or at dealerships, rates may be higher, while independent shops often charge less. It's advisable to consult local repair shops for a more accurate estimate based on your vehicle's specific needs and the local labor market.

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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 B27C7 Infiniti Code

1. What are the common symptoms of OBDII code B27C7 in an Infiniti related to the Compressor Discharge Refrigerant Temperature Sensor High?

- Common symptoms include reduced cooling performance from the air conditioning system, intermittent or constant display of the check engine light, and potential issues with the vehicle's climate control system.

2. What are some possible causes of OBDII code B27C7 in an Infiniti?

- Possible causes may include a malfunctioning compressor discharge refrigerant temperature sensor, wiring or connector issues related to the sensor, or problems with the air conditioning system itself.

3. How can I diagnose the cause of OBDII code B27C7 in my Infiniti?

- A diagnostic scan tool can be used to retrieve the specific code and further investigate the issue. Additionally, checking the sensor's wiring and connections for any damage or corrosion can help pinpoint the cause.

4. Can I continue driving my Infiniti with OBDII code B27C7 present?

- It is generally not recommended to continue driving with this code present, as it can lead to reduced cooling performance and potential damage to the air conditioning system. It is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code B27C7 in an Infiniti?

- Repair tips may include replacing the compressor discharge refrigerant temperature sensor, ensuring proper wiring and connections, and resetting the fault code after the repair is completed.

6. Is it possible to reset OBDII code B27C7 in an Infiniti without repairing the issue?

- While it is possible to reset the fault code temporarily, it is important to address the underlying issue causing the code to prevent further problems with the air conditioning system.

7. How much does it typically cost to repair OBDII code B27C7 in an Infiniti?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve replacing the sensor, addressing wiring problems, or repairing the air conditioning system. Costs can range from a few hundred to over a thousand dollars.

8. Are there any recalls or technical service bulletins related to OBDII code B27C7 in Infiniti vehicles?

- It is advisable to check with the manufacturer or authorized service centers for any recalls or technical service bulletins related to this specific OBDII code in Infiniti vehicles.

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