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Code P2E85

Quick reference

P2E85 at a glance

Plain-language meaning
This code means that the car's computer has detected a problem with a sensor that checks the voltage coming into the battery charger. It's like if your phone charger wasn't getting enough power to charge your phone properly.
Urgency
Moderate – It should be addressed soon to prevent battery issues.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
Multimeter, Diagnostic scanner, Wiring repair kit

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

Laymans terms

This code means that the car's computer has detected a problem with a sensor that checks the voltage coming into the battery charger. It's like if your phone charger wasn't getting enough power to charge your phone properly.

Explanation

The P2E85 code indicates that the sensor monitoring the input voltage to the battery charger is reading a voltage that is lower than expected.

Technical description

The Battery Charger B Input Voltage Sensor Circuit Low code is triggered when the vehicle's powertrain control module (PCM) detects that the input voltage to the battery charger is below the specified range. This could be due to a malfunctioning sensor, wiring issues, or a problem with the battery charger itself.

Symptoms

• Battery not charging properly

• Warning light on dashboard

• Reduced vehicle performance

Common Causes

• Faulty voltage sensor

• Poor electrical connections

• Damaged wiring or connectors

Glossary

PCM: Powertrain Control Module

Voltage Sensor: A device that measures electrical voltage levels

Diagnosis steps

• Inspect battery charger connections

• Check wiring and connectors for damage

• Test the voltage sensor functionality

Repair procedures

• Replace faulty voltage sensor

• Repair or replace damaged wiring

• Ensure all connections are secure

Tools required

• Multimeter

• Diagnostic scanner

• Wiring repair kit

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Nissan Leaf

• Toyota Prius

Preventive measures

• Regular maintenance checks

• Ensure battery terminals are clean

• Avoid overloading electrical systems

Error code type

Sensor Issue

User experience recommendations

• Have your vehicle inspected by a professional

• Avoid using high electrical loads until fixed

Warranty information

Check your vehicle's warranty for coverage on electrical components.

Historical data

This code has been reported in hybrid and electric vehicles, often related to battery management systems.

Urgency level

Moderate – It should be addressed soon to prevent battery issues.

Testing conditions

• Vehicle in 'ON' position

• Battery charger connected

Component location

The battery charger and its sensors are typically located near the vehicle's battery or power distribution center.

FAQs

Q: Can I drive my car with this code?
A: It's not recommended as it can lead to battery issues and reduced performance.

Q: How do I know if my battery charger is faulty?
A: A diagnostic scan and voltage tests can determine if the charger is malfunctioning.

Optional diagnostic gear

Tools that may help diagnose P2E85

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
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