AutoCodes – Generic – B2640

B2640 Code - Electric Compressor Main Voltage Minimum

Quick Answer

The Inverter monitors power voltage from the main battery in the circuit. 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: B2640 indicates Electric Compressor Main Voltage Minimum.
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 1,078

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 Jan 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2640 Description

The Inverter monitors power voltage from the main battery in the circuit. The Inverter it stops compressor control and outputs the Diagnostic Trouble Code (DTC) when the monitored voltage is outside the specified range. The output DTC of B2640 are memorized only present trouble.

OBDII Code B2640 - Electric Compressor Main Voltage Minimum - AutoCodes.com — B2640 Code - Electric Compressor Main Voltage Minimum

What does this mean?

What are the Possible Causes of the DTC B2640?

Faulty Electric Compressor
Electric Compressor harness is open or shorted
Electric Compressor circuit poor electrical connection
Faulty Inverter

How to Fix the DTC B2640?

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 B2640 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 B2640 code?

Need more information on how to fix the B2640 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2640 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2640 Infiniti — Electric Compressor Main Voltage Minimum
B2640 Nissan — Electric Compressor Main Voltage Minimum

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 B2640 Code

1. What are the common symptoms of OBDII code B2640?

The common symptoms of OBDII code B2640 (Electric Compressor Main Voltage Minimum) include issues with the air conditioning system, poor cooling performance, and possible activation of the Check Engine Light.

2. What are the possible causes of OBDII code B2640?

Possible causes of OBDII code B2640 include a faulty electric compressor, damaged wiring or connectors in the compressor circuit, low refrigerant levels, or issues with the compressor control module.

3. How can I diagnose OBDII code B2640?

Diagnosing OBDII code B2640 involves using a scan tool to retrieve the code and then performing a thorough inspection of the electric compressor, checking for any visible damage or loose connections. Testing the compressor's voltage and resistance may also be necessary.

4. Can OBDII code B2640 be repaired at home?

Repairing OBDII code B2640 may require specialized tools and expertise, so it is recommended to have a professional mechanic diagnose and repair the issue. However, checking for loose connections or damaged wiring in the compressor circuit can be a basic DIY step.

5. How serious is OBDII code B2640?

OBDII code B2640 is not considered a serious issue in terms of safety, but it can affect the performance of the air conditioning system in your vehicle. Ignoring the code may result in discomfort due to poor cooling performance.

6. Are there any preventive measures to avoid OBDII code B2640?

To prevent OBDII code B2640, it is recommended to regularly maintain your vehicle's air conditioning system, including checking refrigerant levels, ensuring proper compressor operation, and addressing any strange noises or performance issues promptly.

7. Can a low battery voltage trigger OBDII code B2640?

Yes, a low battery voltage can potentially trigger OBDII code B2640, as it may impact the overall electrical system of the vehicle, including the electric compressor's performance.

8. How much does it cost to repair OBDII code B2640?

The cost of repairing OBDII code B2640 can vary depending on the underlying cause of the issue, the labor rates in your area, and the cost of any replacement parts needed. It is advisable to obtain quotes from different repair shops for an accurate estimate.

9. Can I drive my vehicle with OBDII code B2640?

It is generally safe to drive your vehicle with OBDII code B2640, but you may experience poor cooling performance from the air conditioning system. It is recommended to have the issue diagnosed and repaired at your earliest convenience.

10. Is resetting the OBDII system an effective way to clear code B2640?

Resetting the OBDII system may temporarily clear code B2640, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent the code from returning.