AutoCodes – Nissan – B2642 Nissan

B2642 Nissan 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 Nissan 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.

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Code Popularity 614

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

What does this mean?

What are the Possible Causes of the DTC B2642 Nissan?

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

How to Fix the DTC B2642 Nissan?

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 Nissan 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.

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

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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 B2642 Nissan Code

1. What does the OBDII code B2642 mean on a Nissan?

The code B2642 indicates an "Electric Compressor Main Voltage Malfunction," meaning there is an issue with the voltage supplied to the electric compressor.

2. What are the common symptoms of the B2642 code in a Nissan?

Symptoms may include the air conditioning not working, reduced cooling performance, or the A/C system shutting down entirely.

3. What causes the B2642 code to appear?

Common causes include a faulty electric compressor, wiring or connector issues, a defective inverter assembly, or problems with the vehicle's electrical system such as a weak battery or alternator.

4. Can a low refrigerant level trigger the B2642 code?

No, a low refrigerant level does not directly trigger the B2642 code, but it can cause the compressor to operate abnormally, potentially leading to related issues.

5. How do you diagnose the B2642 code?

Diagnosis includes checking the electric compressorâ€™s wiring and connectors for damage, testing the compressor for proper voltage and resistance, and verifying the inverter assembly's performance.

6. Is it safe to drive with the B2642 code active?

Yes, it is generally safe to drive, but the air conditioning system may not function, which could cause discomfort, especially in hot weather.

7. How can the B2642 code be fixed on a Nissan?

Repairs may involve replacing the electric compressor, repairing damaged wiring or connectors, or replacing the inverter assembly if itâ€™s faulty.

8. Does the B2642 code mean the electric compressor is completely broken?

Not necessarily. The issue could be with the supporting electrical components or wiring rather than the compressor itself.

9. Can a faulty alternator cause the B2642 code?

Yes, a failing alternator can lead to insufficient voltage, which may trigger the B2642 code.

10. How much does it cost to fix the B2642 code on a Nissan?

The cost varies depending on the root cause. Replacing the electric compressor could cost $1,000â€“$2,000, while fixing wiring or connectors typically costs much less.