AutoCodes – Generic – B2787

B2787 Code - Electric Compressor Voltage Saturation

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the motor voltage 140% or more relative to the inverter output voltage. Common causes include Faulty Li-ion Battery, Faulty Electric Compressor, Electric Compressor harness is open or shorted. 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: B2787 indicates Electric Compressor Voltage Saturation.
Common causes: Common causes include Faulty Li-ion Battery, Faulty Electric Compressor, Electric Compressor harness is open or shorted.
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 2,724

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 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2787 Description

The Diagnostic Trouble Code (DTC) sets when the motor voltage 140% or more relative to the inverter output voltage.

OBDII Code B2787 - Electric Compressor Voltage Saturation - AutoCodes.com — B2787 Code - Electric Compressor Voltage Saturation

What does this mean?

What are the Possible Causes of the DTC B2787?

Faulty Li-ion Battery
Faulty Electric Compressor
Electric Compressor harness is open or shorted
Electric Compressor circuit poor electrical connection
Faulty Cooling Fan
Refrigerant charge

How to Fix the DTC B2787?

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 B2787 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 B2787 code?

Need more information on how to fix the B2787 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2787 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2787 Nissan — Electric Compressor Voltage Saturation

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 B2787 Code

1. What are the common symptoms of OBDII code B2787 (Electric Compressor Voltage Saturation)?

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

2. What are the possible causes of OBDII code B2787?

- The code B2787 can be triggered by issues such as a faulty electric compressor, a malfunctioning compressor control module, wiring issues, or low refrigerant levels.

3. How can I diagnose OBDII code B2787?

- Diagnosing code B2787 involves using an OBDII scanner to retrieve the code, inspecting the electric compressor and related components for any visible damage, and checking the wiring connections for any signs of wear or corrosion.

4. Can low refrigerant levels cause OBDII code B2787 to appear?

- Yes, low refrigerant levels can cause the electric compressor to work harder than normal, potentially leading to voltage saturation and triggering code B2787.

5. How can I repair OBDII code B2787 (Electric Compressor Voltage Saturation)?

- Repairing code B2787 may involve replacing the electric compressor, repairing or replacing any damaged wiring, checking and refilling refrigerant levels, or resetting the compressor control module.

6. Is it safe to continue driving with OBDII code B2787 present?

- It is not recommended to continue driving with OBDII code B2787 present, as it can lead to further damage to the air conditioning system and potentially result in a complete failure of the system.

7. Can I reset OBDII code B2787 without fixing the underlying issue?

- While you can clear the code temporarily using an OBDII scanner, it is important to address the underlying issue causing code B2787 to prevent further problems with the air conditioning system.

8. How much does it typically cost to repair OBDII code B2787?

- The cost of repairing code B2787 can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Are there any preventative measures to avoid OBDII code B2787 in the future?

- Regular maintenance of the air conditioning system, including checking refrigerant levels, inspecting the compressor and wiring, and addressing any issues promptly, can help prevent code B2787 from appearing.

10. Can a DIY enthusiast repair OBDII code B2787 at home?

- While some basic inspections and maintenance tasks can be done at home, diagnosing and repairing code B2787 may require specialized tools and expertise, so it is recommended to consult a professional mechanic for this issue.