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B27B8 Infiniti Code - Electric Compressor Over Loaded

Quick Answer

The B27B8 diagnostic trouble code (DTC) indicates an issue with the electric compressor in an Infiniti vehicle, specifically signaling that the compressor has become overloaded. Common causes include Low refrigerant levels due to leaks or improper charging, Mechanical obstruction or failure within the compressor itself, Electrical issues, such as short circuits or faulty wiring leading to increased current draw. 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
B27B8 Infiniti indicates Electric Compressor Over Loaded.
Common causes
Common causes include Low refrigerant levels due to leaks or improper charging, Mechanical obstruction or failure within the compressor itself, Electrical issues, such as short circuits or faulty wiring leading to increased current draw.
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.
What is this?
Table of contents Created and updated by William Orellana on Oct 24, 2024
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Code B27B8 Infiniti Description

The B27B8 diagnostic trouble code (DTC) indicates an issue with the electric compressor in an Infiniti vehicle, specifically signaling that the compressor has become overloaded. This code typically arises from the vehicle's onboard diagnostic system detecting excessive current draw from the electric compressor, which is responsible for regulating the vehicle's air conditioning (A/C) system. When the compressor is overloaded, it can lead to inadequate cooling performance, increased wear on the compressor components, and potential failure of the compressor itself.

OBDII Code B27B8 Infiniti - Electric Compressor Over Loaded
B27B8 Infiniti Code - Electric Compressor Over Loaded

Common Causes of B27B8 Infiniti

  1. Low refrigerant levels due to leaks or improper charging.
  2. Mechanical obstruction or failure within the compressor itself.
  3. Electrical issues, such as short circuits or faulty wiring leading to increased current draw.
  4. Faulty pressure sensors that inaccurately report system pressures.
  5. Blockages in the A/C system, such as clogged expansion valves or evaporators, causing increased resistance.

Symptoms of B27B8 Infiniti

  1. Inconsistent or inadequate cooling from the A/C system.
  2. Unusual noises coming from the compressor, such as grinding or rattling.
  3. Increased electrical load, potentially causing dimming lights or other electrical issues.
  4. A/C system cycling on and off frequently.
  5. Warning lights illuminated on the dashboard, particularly related to the A/C or electrical systems.

How to Fix B27B8 Infiniti

  1. Diagnostic Assessment: Begin with a thorough diagnostic scan to confirm the B27B8 code and check for any related codes that may provide additional context.
  2. Visual Inspection: Inspect the electric compressor and associated wiring for any visible signs of damage, wear, or corrosion. Check for leaks in the refrigerant lines.
  3. Refrigerant Check: Measure the refrigerant levels in the A/C system. If low, locate and repair any leaks before recharging the system to the manufacturer’s specifications.
  4. Electrical Testing: Test the electrical connections and components associated with the compressor, including relays and fuses, to ensure they are functioning correctly and not contributing to the overload.
  5. Compressor Replacement: If the compressor is determined to be faulty or damaged beyond repair, replace it with a new or remanufactured unit, ensuring all seals and components are replaced as necessary.

Cost to Fix B27B8 Infiniti

The typical repair costs for addressing the B27B8 code can vary widely based on the specific issue identified during diagnosis. For minor repairs, such as refrigerant recharging or electrical fixes, costs may range from $150 to $500. However, if the compressor needs to be replaced, costs can escalate to between $800 and $1,500, including parts and labor. It's important to note that labor rates can differ based on location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour; however, rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. For a more precise estimate, it's advisable to check local rates and obtain quotes from multiple repair facilities.

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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 B27B8 Infiniti Code

1. What are the common symptoms of OBDII code B27B8 Electric Compressor Over Loaded in an Infiniti?

- Common symptoms include the air conditioning system not blowing cold air, unusual noises coming from the compressor, and the AC system not functioning properly.

2. What can cause the OBDII code B27B8 Electric Compressor Over Loaded in an Infiniti?

- This code is typically triggered by a malfunction in the electric compressor, such as a wiring issue, a faulty compressor motor, or an overload condition.

3. How can I diagnose the OBDII code B27B8 Electric Compressor Over Loaded in my Infiniti?

- Diagnosis involves using an OBDII scanner to retrieve the code, checking the compressor wiring and connections, and testing the compressor motor for proper function.

4. Can I continue driving my Infiniti with the OBDII code B27B8 Electric Compressor Over Loaded?

- It is not recommended to continue driving with this code active, as it can lead to further damage to the AC system and potentially cause overheating issues.

5. What are some repair tips for fixing the OBDII code B27B8 Electric Compressor Over Loaded in an Infiniti?

- Repair tips may include checking and repairing any damaged wiring, replacing the faulty compressor motor, resetting the code, and testing the AC system for proper operation.

6. Will resetting the OBDII code B27B8 Electric Compressor Over Loaded fix the issue?

- Resetting the code may temporarily clear the warning, but it is important to address the root cause of the problem to prevent the code from recurring.

7. How much does it typically cost to repair the OBDII code B27B8 Electric Compressor Over Loaded in an Infiniti?

- The cost of repair can vary depending on the extent of the issue, but it may involve expenses for parts replacement, labor, and diagnostic fees.

8. Can a DIY enthusiast fix the OBDII code B27B8 Electric Compressor Over Loaded issue in an Infiniti?

- While some basic troubleshooting steps can be done by a DIY enthusiast, repairing this code may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. Are there any preventive measures to avoid the OBDII code B27B8 Electric Compressor Over Loaded in an Infiniti?

- Regular maintenance of the AC system, checking for any signs of wear or damage, and addressing issues promptly can help prevent the occurrence of this code.

10. How long does it typically take to repair the OBDII code B27B8 Electric Compressor Over Loaded in an Infiniti?

- The repair time can vary based on the complexity of the issue and the availability of parts, but it may take a few hours to a day to address the problem effectively.

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