AutoCodes – Generic – B27C1

B27C1 Code - Heat Pump Control Unit

Quick Answer

The Diagnostic Trouble Code (DTC) sets when there is a malfunction in the signal transmitted from the Heat Pump Control Unit. Common causes include Faulty Heat Pump Control Unit, Heat Pump Control Unit harness is open or shorted, Heat Pump Control Unit 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: B27C1 indicates Heat Pump Control Unit.
Common causes: Common causes include Faulty Heat Pump Control Unit, Heat Pump Control Unit harness is open or shorted, Heat Pump Control Unit 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 686

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 B27C1 Description

The Diagnostic Trouble Code (DTC) sets when there is a malfunction in the signal transmitted from the Heat Pump Control Unit.

OBDII Code B27C1 - Heat Pump Control Unit - AutoCodes.com — B27C1 Code - Heat Pump Control Unit

What does this mean?

What are the Possible Causes of the DTC B27C1?

Faulty Heat Pump Control Unit
Heat Pump Control Unit harness is open or shorted
Heat Pump Control Unit circuit poor electrical connection
Faulty A/C Auto Amplifier

How to Fix the DTC B27C1?

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 B27C1 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 B27C1 code?

Need more information on how to fix the B27C1 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27C1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B27C1 Infiniti — Heat Pump Control Unit
B27C1 Nissan — Heat Pump Control Unit

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 B27C1 Code

1. What are common symptoms of OBDII code B27C1 related to the Heat Pump Control Unit?

- Common symptoms include poor heating performance, lack of defrosting ability, and issues with the HVAC system in the vehicle.

2. What are the possible causes of OBDII code B27C1 for the Heat Pump Control Unit?

- The code B27C1 can be triggered by a malfunctioning heat pump control unit, wiring issues, or sensor failures within the HVAC system.

3. How can I diagnose OBDII code B27C1 for the Heat Pump Control Unit?

- Diagnosis involves using a scan tool to retrieve the specific code, checking the condition of the heat pump control unit, inspecting wiring for damage, and testing sensors for proper functionality.

4. Can a DIY enthusiast repair OBDII code B27C1 related to the Heat Pump Control Unit?

- While some basic troubleshooting steps can be performed by DIY enthusiasts, resolving the root cause of the code may require advanced diagnostic tools and expertise, best left to professional mechanics.

5. Is it safe to continue driving with OBDII code B27C1 affecting the Heat Pump Control Unit?

- It is not recommended to drive with unresolved OBDII codes, as they can lead to further damage and safety hazards. It's advisable to address the issue promptly.

6. Are there any quick fixes or temporary solutions for OBDII code B27C1 associated with the Heat Pump Control Unit?

- Quick fixes such as checking and securing wiring connections, resetting the system, or clearing the code temporarily may help but should be followed by a complete diagnosis and repair.

7. What are the typical repair options for OBDII code B27C1 related to the Heat Pump Control Unit?

- Repair options may include replacing the heat pump control unit, repairing or replacing damaged wiring, recalibrating sensors, or addressing any underlying issues identified during diagnosis.

8. How much does it cost to fix OBDII code B27C1 for the Heat Pump Control Unit?

- Repair costs can vary depending on the specific underlying cause, parts needed, labor rates, and whether the repair is done at a dealership or an independent repair shop. It's recommended to obtain multiple quotes.

9. Can extreme weather conditions affect the triggering of OBDII code B27C1 for the Heat Pump Control Unit?

- Extreme cold or heat can sometimes exacerbate issues related to the heat pump control unit, potentially leading to the triggering of the B27C1 code due to increased strain on the system.

10. How can regular maintenance help prevent OBDII code B27C1 issues with the Heat Pump Control Unit?

- Regular maintenance, including checking and cleaning HVAC components, inspecting wiring for wear, and addressing any warning signs promptly, can help prevent the recurrence of OBDII code B27C1 issues.