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Engine-Codes – Generic – B27C6

B27C6 Code - Compressor Discharge Refrigerant Temperature Sensor Low

Quick Answer

The B27C6 diagnostic trouble code (DTC) indicates a low signal from the compressor discharge refrigerant temperature sensor. Common causes include Low refrigerant levels due to leaks or improper charging, Faulty compressor discharge refrigerant temperature sensor, Wiring issues, such as damaged or corroded connectors or harnesses. 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
B27C6 indicates Compressor Discharge Refrigerant Temperature Sensor Low.
Common causes
Common causes include Low refrigerant levels due to leaks or improper charging, Faulty compressor discharge refrigerant temperature sensor, Wiring issues, such as damaged or corroded connectors or harnesses.
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 17, 2024
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Code B27C6 Description

The B27C6 diagnostic trouble code (DTC) indicates a low signal from the compressor discharge refrigerant temperature sensor. This sensor plays a crucial role in the vehicle's air conditioning (A/C) system by monitoring the temperature of the refrigerant as it exits the compressor. A low signal from this sensor can suggest that the refrigerant temperature is lower than expected, which may indicate issues such as insufficient refrigerant levels, a malfunctioning compressor, or a fault in the sensor itself.

OBDII Code B27C6 - Compressor Discharge Refrigerant Temperature Sensor Low
B27C6 Code - Compressor Discharge Refrigerant Temperature Sensor Low

Common Causes of B27C6

  1. Low refrigerant levels due to leaks or improper charging.
  2. Faulty compressor discharge refrigerant temperature sensor.
  3. Wiring issues, such as damaged or corroded connectors or harnesses.
  4. Malfunctioning A/C compressor affecting refrigerant flow and temperature.
  5. Blockages in the A/C system, such as a clogged expansion valve or receiver-drier.

Symptoms of B27C6

  1. Inadequate cabin cooling, even when the A/C is set to maximum.
  2. Fluctuating A/C performance, with intermittent cooling.
  3. Unusual noises from the A/C compressor, indicating potential mechanical failure.
  4. Dashboard warning lights related to the A/C system or engine performance.
  5. Increased humidity inside the vehicle, suggesting improper dehumidification.

How to Fix B27C6

  1. Diagnostic Testing: Begin with a thorough diagnostic scan to confirm the B27C6 code and check for any additional codes that may indicate related issues.
  2. Visual Inspection: Inspect the wiring and connectors associated with the compressor discharge refrigerant temperature sensor for damage, corrosion, or loose connections.
  3. Sensor Replacement: If the sensor is found to be faulty, replace it with a new one, ensuring proper installation and sealing.
  4. Refrigerant Level Check: Check the refrigerant levels in the A/C system and recharge if necessary, ensuring there are no leaks.
  5. System Testing: After repairs, run the A/C system to verify that the issue has been resolved and that the refrigerant temperature readings are within the expected range.

Cost to Fix B27C6

The typical cost to diagnose and repair the B27C6 code can range from $150 to $600, depending on the specific repairs needed. This estimate includes parts such as the temperature sensor, which can cost between $50 and $150, and labor, which may range from $80 to $150 per hour. The total cost will vary based on factors such as the vehicle make and model, the complexity of the repair, and the labor rates at local auto repair shops. It's important to note that rates may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive pricing. For a more precise estimate, it's advisable to consult local repair shops.

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Code B27C6 Information for Specific Makes

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 B27C6 Code

What does the OBDII code B27C6 mean?

The OBDII code B27C6 indicates that the Compressor Discharge Refrigerant Temperature Sensor is reading a low temperature, which may suggest an issue with the sensor or the air conditioning system.

What are the symptoms of a B27C6 code?

Common symptoms include poor air conditioning performance, unusual noises from the compressor, or the A/C system cycling on and off frequently.

What causes the B27C6 code to trigger?

The code can be triggered by a faulty refrigerant temperature sensor, low refrigerant levels, electrical issues such as damaged wiring or connectors, or a malfunctioning A/C compressor.

How can I diagnose a B27C6 code?

To diagnose the code, check the refrigerant levels, inspect the temperature sensor and its wiring for damage, and use a multimeter to test the sensor's resistance.

Can low refrigerant levels cause a B27C6 code?

Yes, low refrigerant levels can lead to incorrect readings from the temperature sensor, triggering the B27C6 code.

What are some common repair tips for the B27C6 code?

Repairs may include replacing a faulty refrigerant temperature sensor, fixing any wiring issues, recharging the A/C system with refrigerant, or replacing a malfunctioning compressor.

Is it safe to drive with a B27C6 code?

While it may be safe to drive, the A/C system may not function properly, and ignoring the issue could lead to further damage or more expensive repairs.

Should I reset the code after repairs?

Yes, after completing repairs, use an OBDII scanner to clear the code and monitor the system to ensure the issue is resolved.

How can I prevent the B27C6 code from occurring?

Regular maintenance of your vehicle's A/C system, including checking refrigerant levels and inspecting components, can help prevent this code from appearing.

Discuss the causes and fixes for B27C6 OBDII Code

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