AutoCodes – Generic – B27B1

B27B1 Code - Electric Compressor Low Voltage

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the high voltage system input voltage is less than 230 V. Common causes include Faulty Electric Compressor, Electric Compressor harness is open or shorted, Electric Compressor 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: B27B1 indicates Electric Compressor Low Voltage.
Common causes: Common causes include Faulty Electric Compressor, Electric Compressor harness is open or shorted, Electric Compressor 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 747

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 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B27B1 Description

The Diagnostic Trouble Code (DTC) sets when the high voltage system input voltage is less than 230 V.

OBDII Code B27B1 - Electric Compressor Low Voltage - AutoCodes.com — B27B1 Code - Electric Compressor Low Voltage

What does this mean?

What are the Possible Causes of the DTC B27B1?

Faulty Electric Compressor
Electric Compressor harness is open or shorted
Electric Compressor circuit poor electrical connection
Faulty Li-ion Battery
Faulty Power Delivery Module (PDM)

How to Fix the DTC B27B1?

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 B27B1 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 B27B1 code?

Need more information on how to fix the B27B1 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B27B1 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B27B1 Infiniti — Electric Compressor Low Voltage
B27B1 Nissan — Electric Compressor Low Voltage

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 B27B1 Code

1. What are the common symptoms of OBDII code B27B1 (Electric Compressor Low Voltage)?

- Common symptoms include weak or no cold air coming from the air conditioning system, abnormal compressor noise, and the AC system not cooling the vehicle interior effectively.

2. What are the possible causes of OBDII code B27B1?

- The code B27B1 can be triggered by issues such as a faulty electric compressor, low refrigerant levels, a damaged compressor clutch, wiring harness problems, or a malfunctioning compressor control module.

3. How can I diagnose the cause of OBDII code B27B1?

- Diagnosing the cause of B27B1 typically involves checking the electric compressor for proper operation, inspecting the wiring harness for any damage, verifying refrigerant levels, and testing the compressor clutch for functionality.

4. Can low voltage in the electric compressor affect the overall performance of my vehicle's air conditioning system?

- Yes, low voltage in the electric compressor can lead to reduced cooling performance and potential damage to other AC components if left unresolved.

5. What are some repair tips for addressing OBDII code B27B1?

- Repair tips may include checking and repairing any damaged wiring, ensuring the compressor clutch is engaging properly, verifying refrigerant levels, and, if necessary, replacing the electric compressor or compressor control module.

6. Is it safe to continue driving with OBDII code B27B1 present?

- It is not recommended to continue driving with code B27B1 as it can lead to further AC system damage and discomfort while driving, especially in hot weather.

7. How much does it typically cost to repair OBDII code B27B1?

- The cost of repairing code B27B1 can vary depending on the underlying cause, but it may involve expenses for parts replacement, labor fees, and diagnostic testing.

8. Can a DIY enthusiast fix OBDII code B27B1 at home?

- While some basic troubleshooting steps can be taken at home, diagnosing and repairing code B27B1 often requires specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. Will resetting the OBDII system clear code B27B1?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing B27B1 is not addressed, the code is likely to reappear once the problem is detected again.

10. How important is it to address OBDII code B27B1 promptly?

- It is important to address code B27B1 promptly to prevent further damage to the air conditioning system, ensure optimal cooling performance, and maintain the overall comfort of the vehicle occupants.