ezOBD2 - Free OBD2 Code Lookup and Check Engine Light Diagnostic Tool

Find Your OBD2 Code Fast

Type the code from your scanner to get causes, symptoms, and fixes.

Code P2E39

Quick reference

P2E39 at a glance

Plain-language meaning
This code means that there is a problem with the fuse that helps charge the car's battery. It's like when a light bulb doesn't work because the fuse is blown.
Urgency
High – This issue can prevent the vehicle from operating if the battery is not charging.
Difficulty
Moderate
System
Electrical Circuit Issue
Tools mentioned
Multimeter, Fuse puller, Screwdriver set

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that there is a problem with the fuse that helps charge the car's battery. It's like when a light bulb doesn't work because the fuse is blown.

Explanation

The P2E39 code indicates an issue with the fuse associated with the battery charger circuit B, which may prevent the battery from charging properly.

Technical description

The P2E39 code is triggered when the vehicle's onboard diagnostics system detects a fault in the battery charger B fuse circuit. This could be due to a blown fuse, a wiring issue, or a problem with the battery charger itself.

Symptoms

• Battery not charging

• Warning light on the dashboard

• Electrical components not functioning properly

Common Causes

• Blown battery charger B fuse

• Faulty battery charger

• Wiring issues in the battery charger circuit

Glossary

Fuse: A safety device that protects electrical circuits by breaking the connection if the current is too high.

Battery Charger: A device that provides electrical energy to recharge a battery.

Diagnosis steps

• Check the battery charger B fuse for continuity.

• Inspect the wiring and connections in the battery charger circuit.

• Test the battery charger for proper operation.

Repair procedures

• Replace the blown fuse with a new one.

• Repair any damaged wiring or connections.

• Replace the faulty battery charger if necessary.

Tools required

• Multimeter

• Fuse puller

• Screwdriver set

Estimated repair cost

$50 - $200

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Nissan Leaf

• Toyota Prius

Preventive measures

• Regularly check the battery and charging system.

• Ensure all electrical connections are secure.

• Replace fuses as needed.

Error code type

Electrical Circuit Issue

User experience recommendations

• Avoid using electrical components until the issue is resolved.

• Have the vehicle inspected by a professional if unsure.

Warranty information

Check with your vehicle manufacturer for specific warranty coverage related to the charging system.

Historical data

This code has been reported in hybrid and electric vehicles where charging systems are complex and sensitive to electrical faults.

Urgency level

High – This issue can prevent the vehicle from operating if the battery is not charging.

Testing conditions

• Vehicle in 'ON' position

• Battery charger connected

Component location

The battery charger B fuse is typically located in the vehicle's fuse box, which can be found under the hood or inside the cabin.

FAQs

Q: What happens if I ignore this code?
A: Ignoring this code can result in a dead battery and the vehicle not starting.

Q: Can I replace the fuse myself?
A: Yes, if you are comfortable doing so and have the right tools, but ensure to use the correct fuse rating.

Optional diagnostic gear

Tools that may help diagnose P2E39

THINKCAR ThinkScan Bidirectional diagnostic tool illustration

High-End · Full-system diagnostics

THINKCAR ThinkScan Bidirectional

A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.

Network faults often require full-system access instead of a generic code reader alone.

View on Amazon
Klein Tools MM325 diagnostic tool illustration

Universal · Digital multimeter

Klein Tools MM325

A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.

Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.

View on Amazon
WORKPRO Wiring Repair Kit diagnostic tool illustration

Universal · Wire connectors and repair kit

WORKPRO Wiring Repair Kit

Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.

Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
🌙