AutoCodes – Generic – B27C3

B27C3 Code - PTC Outlet Air Temperature Sensor High

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Positive Temperature Coefficient (PTC) heater outlet air temperature sensor recognition temperature is too high [more than 200Â°C (392Â°F)]. Common causes include Faulty Positive Temperature Coefficient (PTC) Outlet Air Temperature Sensor, PTC Outlet Air Temperature Sensor harness is open or shorted, PTC Outlet Air 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: B27C3 indicates PTC Outlet Air Temperature Sensor High.
Common causes: Common causes include Faulty Positive Temperature Coefficient (PTC) Outlet Air Temperature Sensor, PTC Outlet Air Temperature Sensor harness is open or shorted, PTC Outlet Air 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 917

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 B27C3 Description

The Diagnostic Trouble Code (DTC) sets when the Positive Temperature Coefficient (PTC) heater outlet air temperature sensor recognition temperature is too high [more than 200Â°C (392Â°F)].

OBDII Code B27C3 - PTC Outlet Air Temperature Sensor High - AutoCodes.com — B27C3 Code - PTC Outlet Air Temperature Sensor High

What does this mean?

What are the Possible Causes of the DTC B27C3?

Faulty Positive Temperature Coefficient (PTC) Outlet Air Temperature Sensor
PTC Outlet Air Temperature Sensor harness is open or shorted
PTC Outlet Air Temperature Sensor circuit poor electrical connection
Faulty A/C Auto Amplifier

How to Fix the DTC B27C3?

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 B27C3 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 B27C3 code?

Need more information on how to fix the B27C3 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27C3 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B27C3 Infiniti — PTC Outlet Air Temperature Sensor High
B27C3 Nissan — PTC Outlet Air 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 B27C3 Code

1. What are the common symptoms of OBDII code B27C3 PTC Outlet Air Temperature Sensor High?

- Common symptoms include poor heater performance, incorrect HVAC system operation, and potential triggering of the Check Engine Light.

2. What are some possible causes of OBDII code B27C3 PTC Outlet Air Temperature Sensor High?

- Possible causes include a faulty PTC outlet air temperature sensor, wiring issues, or problems within the heating system.

3. How can I diagnose the issue related to OBDII code B27C3?

- Diagnosis typically involves using a diagnostic scanner to read the code, testing the PTC outlet air temperature sensor, and inspecting related wiring for any damage.

4. Is it safe to continue driving with OBDII code B27C3 present?

- It is generally not recommended to continue driving with this code unresolved, as it can lead to poor heating performance and potential issues with the HVAC system.

5. Can I repair OBDII code B27C3 PTC Outlet Air Temperature Sensor High myself?

- While DIY repairs are possible for some enthusiasts, it is advisable to have a professional mechanic diagnose and repair this issue to ensure proper resolution.

6. What are some tips for repairing OBDII code B27C3 PTC Outlet Air Temperature Sensor High?

- Tips include checking and replacing the PTC outlet air temperature sensor, repairing any damaged wiring, and ensuring proper connections and sensor functionality.

7. How much does it typically cost to repair OBDII code B27C3?

- Repair costs can vary depending on the underlying issue, but expect to pay for diagnostic time, parts, and labor, which can range from a few hundred to a thousand dollars.

8. Will resetting the Check Engine Light resolve OBDII code B27C3 temporarily?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the code will likely reappear once the problem persists.

9. Can extreme weather conditions affect OBDII code B27C3 PTC Outlet Air Temperature Sensor High?

- Extreme cold or heat can potentially affect sensor readings and trigger this code, so it's important to consider environmental factors during diagnosis and repair.

10. How urgent is it to address OBDII code B27C3 PTC Outlet Air Temperature Sensor High?

- While not an emergency, addressing this code promptly is recommended to prevent further HVAC system issues and ensure optimal heating performance in your vehicle.