AutoCodes – Nissan – B27C9 Nissan

B27C9 Nissan Code - Compressor Suction Refrigerant Temperature Sensor High

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the compressor suction refrigerant temperature sensor recognition temperature is too high [more than 138.4Â°C (281.1Â°F)]. Common causes include Faulty Compressor Suction Refrigerant Temperature Sensor, Compressor Suction Refrigerant Temperature Sensor harness is open or shorted, Compressor Suction Refrigerant Temperature 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: B27C9 Nissan indicates Compressor Suction Refrigerant Temperature Sensor High.
Common causes: Common causes include Faulty Compressor Suction Refrigerant Temperature Sensor, Compressor Suction Refrigerant Temperature Sensor harness is open or shorted, Compressor Suction Refrigerant Temperature 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.

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Code Popularity 515

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 B27C9 Nissan Description

The Diagnostic Trouble Code (DTC) sets when the compressor suction refrigerant temperature sensor recognition temperature is too high [more than 138.4Â°C (281.1Â°F)].

OBDII Code B27C9 Nissan - Compressor Suction Refrigerant Temperature Sensor High - AutoCodes.com — B27C9 Nissan Code - Compressor Suction Refrigerant Temperature Sensor High

What does this mean?

What are the Possible Causes of the DTC B27C9 Nissan?

Faulty Compressor Suction Refrigerant Temperature Sensor
Compressor Suction Refrigerant Temperature Sensor harness is open or shorted
Compressor Suction Refrigerant Temperature Sensor circuit poor electrical connection
Faulty A/C Auto Amplifier

How to Fix the DTC B27C9 Nissan?

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 B27C9 Nissan 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.

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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 B27C9 Nissan Code

1. What does the OBDII code B27C9 mean for a Nissan?

The B27C9 code indicates an issue with the Compressor Suction Refrigerant Temperature Sensor, specifically that it is detecting a high temperature reading.

2. What are the symptoms of the B27C9 code in a Nissan?

Common symptoms include reduced air conditioning performance, warm air from the vents, and the A/C system shutting off intermittently.

3. What causes the B27C9 code to appear?

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

4. How do I diagnose the B27C9 code?

Diagnosis involves checking the refrigerant temperature sensor for proper function, inspecting the wiring and connectors for damage, and verifying refrigerant pressure and levels.

5. Can I still drive my Nissan with the B27C9 code active?

Yes, you can still drive the vehicle, but the A/C system may not function properly, affecting cabin comfort, especially in hot weather.

6. How is the B27C9 code typically fixed?

Repairs may include replacing the refrigerant temperature sensor, repairing damaged wiring or connectors, recharging the refrigerant, or servicing the A/C compressor.

7. How much does it cost to fix the B27C9 code?

Repair costs vary but typically range from $100 to $300 for sensor replacement or wiring repairs. If the compressor is faulty, costs may exceed $1,000.

8. Can low refrigerant levels cause the B27C9 code?

Yes, low refrigerant levels can cause the sensor to detect abnormal temperatures, triggering the code.

9. How can I prevent the B27C9 code from returning?

Regularly maintain your A/C system by checking refrigerant levels, inspecting wiring, and servicing the compressor as needed.

10. Do I need special tools to fix the B27C9 code?

Yes, diagnosing and repairing this code may require an OBDII scanner, a multimeter, and A/C system tools for checking refrigerant pressure and recharging.