AutoCodes – Infiniti – B27C4 Infiniti

B27C4 Infiniti Code - A/C Unit Case Temperature Sensor Low

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the A/C unit case temperature sensor recognition temperature is too low [less than - 42Â°C (- 44Â°F)]. Common causes include Faulty A/C Unit Case Temperature Sensor, A/C Unit Case Temperature Sensor harness is open or shorted, A/C Unit Case 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: B27C4 Infiniti indicates A/C Unit Case Temperature Sensor Low.
Common causes: Common causes include Faulty A/C Unit Case Temperature Sensor, A/C Unit Case Temperature Sensor harness is open or shorted, A/C Unit Case 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 459

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 B27C4 Infiniti Description

The Diagnostic Trouble Code (DTC) sets when the A/C unit case temperature sensor recognition temperature is too low [less than - 42Â°C (- 44Â°F)].

OBDII Code B27C4 Infiniti - A/C Unit Case Temperature Sensor Low - AutoCodes.com — B27C4 Infiniti Code - A/C Unit Case Temperature Sensor Low

What does this mean?

What are the Possible Causes of the DTC B27C4 Infiniti?

Faulty A/C Unit Case Temperature Sensor
A/C Unit Case Temperature Sensor harness is open or shorted
A/C Unit Case Temperature Sensor circuit poor electrical connection
Faulty A/C Auto Amplifier

How to Fix the DTC B27C4 Infiniti?

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 B27C4 Infiniti 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 B27C4 Infiniti code?

Need more information on how to fix the B27C4 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27C4 Infiniti code diagnosed by a professional: Find a repair shop in your area

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 B27C4 Infiniti Code

1. What are the common symptoms of OBDII code B27C4 in an Infiniti related to the A/C Unit Case Temperature Sensor Low?

The common symptoms include poor air conditioning performance, inconsistent cooling, and potential issues with the climate control system.

2. What could be causing the A/C Unit Case Temperature Sensor Low code B27C4 in an Infiniti?

Possible causes include a malfunctioning temperature sensor, wiring issues, or a problem with the air conditioning control module.

3. How can I diagnose the A/C Unit Case Temperature Sensor Low code B27C4 in my Infiniti?

Diagnosis typically involves using an OBDII scanner to read the code, checking the A/C system for any visible damage, and testing the temperature sensor and related components.

4. Can I continue driving my Infiniti with the A/C Unit Case Temperature Sensor Low code B27C4?

While it may be possible to drive with this code, it is recommended to address the issue promptly to avoid further damage to the air conditioning system.

5. What are some repair tips for resolving the A/C Unit Case Temperature Sensor Low code B27C4 in an Infiniti?

Repair tips may include inspecting and replacing the temperature sensor, checking and repairing any damaged wiring, and resetting the fault code after the repair.

6. Is it possible to reset the A/C Unit Case Temperature Sensor Low code B27C4 in an Infiniti without repairing the issue?

Resetting the code without addressing the underlying problem may temporarily clear the code, but it is likely to reappear if the root cause is not fixed.

7. How much does it typically cost to repair the A/C Unit Case Temperature Sensor Low code B27C4 in an Infiniti?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the temperature sensor, repairing wiring, or addressing other related components.

8. Are there any preventive maintenance measures I can take to avoid encountering the A/C Unit Case Temperature Sensor Low code B27C4 in my Infiniti?

Regularly inspecting the A/C system, checking for any unusual behavior, and addressing any issues promptly can help prevent this code from appearing.

9. Can extreme weather conditions affect the A/C Unit Case Temperature Sensor Low code B27C4 in an Infiniti?

Extreme heat or cold can potentially affect the performance of the A/C system and the temperature sensor, leading to the triggering of this fault code.

10. How long does it typically take to repair the A/C Unit Case Temperature Sensor Low code B27C4 in an Infiniti?

The repair time can vary depending on the extent of the issue and the availability of parts, but it may take a few hours to a day to complete the necessary repairs.