AutoCodes – Generic – B2642

B2642 Code - Electric Compressor Main Voltage Malfunction

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: B2642 indicates Electric Compressor Main Voltage Malfunction.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,170

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2642 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. If the B2642 is set, the compressor control may not resume unless the ignition switch is turned OFF and waiting for 10 minutes.

OBDII Code B2642 - Electric Compressor Main Voltage Malfunction - AutoCodes.com — B2642 Code - Electric Compressor Main Voltage Malfunction

What does this mean?

What are the Possible Causes of the DTC B2642?

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

How to Fix the DTC B2642?

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 B2642 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 B2642 code?

Need more information on how to fix the B2642 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2642 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2642 Infiniti — Electric Compressor Main Voltage Malfunction
B2642 Nissan — Electric Compressor Main Voltage Malfunction

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 B2642 Code

1. What are the common symptoms of OBDII code B2642 (Electric Compressor Main Voltage Malfunction)?

- Common symptoms include the air conditioning system not cooling properly, unusual noises coming from the compressor, and the AC compressor not engaging.

2. What are the potential causes of OBDII code B2642?

- The code B2642 can be caused by a faulty electric compressor, a problem with the compressor wiring or connectors, low refrigerant levels, or issues with the AC system control module.

3. How can I diagnose OBDII code B2642?

- Diagnosing code B2642 involves checking the wiring and connectors of the electric compressor, ensuring proper refrigerant levels, and using a scan tool to communicate with the AC system control module for trouble codes.

4. What are some repair tips for OBDII code B2642?

- Repair tips include checking the electric compressor for proper operation, inspecting and repairing any damaged wiring or connectors, refilling refrigerant if needed, and resetting the trouble code with a scan tool after repairs.

5. Can I drive my vehicle with OBDII code B2642?

- It is not recommended to drive the vehicle with code B2642, as it can lead to further damage to the AC system and potentially cause overheating issues in the long run.

6. How much does it typically cost to repair OBDII code B2642?

- The cost of repairing code B2642 can vary depending on the exact cause of the issue, but it may range from $200 to $800, including parts and labor.

7. Will resetting the trouble code make OBDII code B2642 go away permanently?

- Resetting the trouble code may temporarily clear the warning light, but if the underlying issue causing code B2642 is not addressed, the code will likely reappear after some time.

8. Can a DIY enthusiast repair OBDII code B2642 at home?

- While some aspects of diagnosing and repairing code B2642 can be done at home by experienced DIY enthusiasts, it is recommended to seek professional help for this particular issue due to the complexity of the AC system.

9. How long does it usually take to repair OBDII code B2642?

- The repair time for code B2642 can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.

10. Are there any preventive measures to avoid OBDII code B2642 in the future?

- To prevent code B2642 in the future, it is recommended to regularly maintain the AC system, check refrigerant levels, and address any AC system issues promptly to avoid further damage.