AutoCodes – Generic – B27C5

B27C5 Code - A/C Unit Case Temperature Sensor High

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the A/C unit case temperature sensor recognition temperature is too high [more than 200Â°C (392Â°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: B27C5 indicates A/C Unit Case Temperature Sensor High.
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 503

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 B27C5 Description

The Diagnostic Trouble Code (DTC) sets when the A/C unit case temperature sensor recognition temperature is too high [more than 200Â°C (392Â°F)].

OBDII Code B27C5 - A/C Unit Case Temperature Sensor High - AutoCodes.com — B27C5 Code - A/C Unit Case Temperature Sensor High

What does this mean?

What are the Possible Causes of the DTC B27C5?

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 B27C5?

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 B27C5 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 B27C5 code?

Need more information on how to fix the B27C5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27C5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B27C5 Infiniti — A/C Unit Case Temperature Sensor High
B27C5 Nissan — A/C Unit Case Temperature Sensor High

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 B27C5 Code

1. What does the OBDII code B27C5 mean?

The code B27C5 indicates that the A/C unit case temperature sensor is detecting a temperature reading that is too high or outside of its normal operating range.

2. What are the common symptoms of code B27C5?

Symptoms may include reduced or no cooling from the A/C system, erratic temperature control, or the climate control system entering a default mode.

3. What causes the B27C5 code to trigger?

Common causes include a faulty A/C unit case temperature sensor, a wiring issue such as a short or open circuit, or an issue with the climate control module.

4. Can I still drive my car with a B27C5 code?

Yes, you can typically drive the car, but the A/C system may not function properly, which could be uncomfortable or problematic in extreme weather conditions.

5. How is the B27C5 code diagnosed?

A mechanic will use a diagnostic scanner to confirm the code, inspect the A/C unit case temperature sensor, check the wiring and connections, and test the climate control module.

6. How do I fix the B27C5 code?

Repairs may involve replacing the faulty temperature sensor, repairing damaged wiring, or reprogramming or replacing the climate control module.

7. How much does it cost to repair a B27C5 code?

The cost varies depending on the specific issue but typically ranges from $100 to $300, including parts and labor.

8. Can I reset the B27C5 code myself?

You can reset the code using an OBDII scanner, but if the underlying issue isnâ€™t addressed, the code will likely return.

9. Can a dirty cabin air filter cause the B27C5 code?

No, a dirty cabin air filter does not directly cause this code, but it can reduce airflow and strain the A/C system.

10. Is the B27C5 code specific to certain car brands?

While the code may appear in various vehicles, its exact interpretation and diagnostic steps can vary depending on the make and model of the car. Always consult your vehicleâ€™s repair manual.