AutoCodes – Generic – B2840

B2840 Code - Power Delivery Module Internal Malfunction

Quick Answer

The Diagnostic Trouble Code (DTC) sets when a Power Delivery Module (PDM) internal malfunction is detected. Common causes include Faulty Power Delivery Module (PDM), Power Delivery Module (PDM) harness is open or shorted, Power Delivery Module (PDM) 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: B2840 indicates Power Delivery Module Internal Malfunction.
Common causes: Common causes include Faulty Power Delivery Module (PDM), Power Delivery Module (PDM) harness is open or shorted, Power Delivery Module (PDM) 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 2,404

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 13, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2840 Description

The Diagnostic Trouble Code (DTC) sets when a Power Delivery Module (PDM) internal malfunction is detected.

OBDII Code B2840 - Power Delivery Module Internal Malfunction - AutoCodes.com — B2840 Code - Power Delivery Module Internal Malfunction

What does this mean?

What are the Possible Causes of the DTC B2840?

Faulty Power Delivery Module (PDM)
Power Delivery Module (PDM) harness is open or shorted
Power Delivery Module (PDM) circuit poor electrical connection

How to Fix the DTC B2840?

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 B2840 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 B2840 code?

Need more information on how to fix the B2840 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2840 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2840 Infiniti — Power Delivery Module Internal Malfunction
B2840 Nissan — Power Delivery Module Internal 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 B2840 Code

1. What does OBDII code B2840 mean?

B2840 indicates a Power Delivery Module Internal Malfunction, suggesting the module that manages power distribution within the vehicle has detected an internal fault.

2. What are the common symptoms of code B2840?

Symptoms may include electrical issues, such as malfunctioning lights, non-functional accessories, or intermittent power loss to specific systems.

3. What causes the B2840 code to appear?

The code is typically caused by internal failure of the Power Delivery Module, wiring issues, or software glitches in the moduleâ€™s control system.

4. Can a faulty battery cause the B2840 code?

Yes, low voltage or a failing battery may trigger this code by causing inconsistent power delivery to the module.

5. How is the B2840 code diagnosed?

A technician will use a scan tool to confirm the code, visually inspect wiring and connectors, and may test the Power Delivery Module itself for faults.

6. Can I drive with the B2840 code active?

Itâ€™s not recommended, as the malfunction could lead to unpredictable electrical system behavior that might affect safety-critical components.

7. How do you fix the B2840 code?

Repairs may involve replacing the Power Delivery Module, repairing or replacing damaged wiring, or updating the moduleâ€™s software.

8. How much does it cost to repair the B2840 code?

Repair costs vary but typically range from $200 to $800, depending on whether wiring repairs or module replacement is necessary.

9. Can I reset the B2840 code without repairs?

Clearing the code without addressing the underlying issue is not recommended, as the problem will likely return and could worsen over time.

10. Is the B2840 code related to other vehicle systems?

Yes, since the Power Delivery Module manages electrical distribution, this code could affect multiple systems, including lighting, HVAC, and infotainment.