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Code P1E25

Quick reference

P1E25 at a glance

Plain-language meaning
The car's computer is having trouble understanding the temperature of a part that helps the car's electric motor work properly.
Urgency
Moderate – Addressing this issue promptly can prevent further damage to the vehicle's electric drive system.
Difficulty
Moderate
System
Sensor Issue
Tools mentioned
OBD-II scanner, Multimeter, Basic hand tools

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

Laymans terms

The car's computer is having trouble understanding the temperature of a part that helps the car's electric motor work properly.

Explanation

This code indicates an issue with the temperature sensor circuit for the inverter of Drive Motor 'B'. The sensor is not providing readings within the expected range.

Technical description

The P1E25 code refers to a problem with the temperature sensor circuit for the inverter associated with Drive Motor 'B'. The inverter is responsible for converting DC power to AC power for the motor. The temperature sensor monitors the inverter's temperature to ensure it operates within safe limits. If the sensor's readings are outside the expected range, this code is triggered.

Symptoms

• Illuminated check engine light

• Reduced vehicle performance

• Possible overheating of the drive motor inverter

Common Causes

• Faulty inverter temperature sensor

• Wiring issues or poor connections in the sensor circuit

• Faulty inverter control module

Glossary

Inverter: A device that converts direct current (DC) to alternating current (AC).

Drive Motor: An electric motor that provides propulsion for the vehicle.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connections for the inverter temperature sensor.

• Test the sensor for proper operation using a multimeter.

Repair procedures

• Replace the faulty temperature sensor.

• Repair or replace damaged wiring or connectors.

• Replace the inverter control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$200 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Volt

• Chevrolet Bolt

• Cadillac ELR

Preventive measures

• Regularly inspect and maintain the vehicle's electrical system.

• Ensure proper cooling system function to prevent overheating.

• Perform routine diagnostic checks.

Error code type

Sensor Issue

User experience recommendations

• Avoid driving the vehicle until the issue is resolved to prevent further damage.

• Consult with a professional mechanic for a thorough diagnosis.

Warranty information

Check with the vehicle manufacturer for warranty coverage on hybrid/electric components.

Historical data

This code is commonly associated with hybrid and electric vehicles due to their reliance on inverter systems.

Urgency level

Moderate – Addressing this issue promptly can prevent further damage to the vehicle's electric drive system.

Testing conditions

• Vehicle at operating temperature

• Use of a diagnostic scanner to monitor sensor readings

Component location

The inverter temperature sensor is typically located near the inverter assembly of Drive Motor 'B'.

FAQs

Q: Can I drive with a P1E25 code?
A: It's not recommended to drive with this code active, as it may lead to overheating and damage to the electric drive system.

Q: How can I prevent this issue?
A: Regular maintenance and checks of the vehicle's electrical and cooling systems can help prevent this issue.

Optional diagnostic gear

Tools that may help diagnose P1E25

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.

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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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