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Code P18E5

Quick reference

P18E5 at a glance

Plain-language meaning
This code means that the car's computer is having trouble getting the right amount of power to a part that helps it know what gear the car is in.
Urgency
Moderate – It should be addressed soon to avoid potential transmission damage.
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

This code means that the car's computer is having trouble getting the right amount of power to a part that helps it know what gear the car is in.

Explanation

The transmission range sensor helps the car's computer understand which gear the transmission is in. If the supply voltage to this sensor is too low, it can cause issues with gear recognition.

Technical description

The P18E5 code indicates that the power supply voltage to the transmission range sensor is below the expected range. This can affect the transmission's ability to properly detect and engage the correct gear, leading to potential drivability issues.

Symptoms

• Check Engine Light is on

• Transmission may not shift properly

• Erratic or incorrect gear display

Common Causes

• Faulty transmission range sensor

• Wiring issues such as a short or open circuit

• Faulty power supply to the sensor

Glossary

OBD-II: On-Board Diagnostics, a standardized system for self-diagnosing and reporting vehicle issues.

Transmission Range Sensor: A sensor that detects the gear position of the transmission.

Diagnosis steps

• Use an OBD-II scanner to confirm the code

• Inspect the wiring and connectors to the transmission range sensor

• Test the voltage supply to the sensor

Repair procedures

• Repair or replace damaged wiring

• Replace the transmission range sensor

• Ensure proper voltage supply to the sensor

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• Ford F-150

• Toyota Camry

Preventive measures

• Regularly inspect and maintain wiring

• Ensure connectors are clean and secure

• Perform routine transmission checks

Error code type

Sensor Issue

User experience recommendations

• Avoid driving until the issue is fixed to prevent further damage

• Consult a professional mechanic for accurate diagnosis

Warranty information

Check if the vehicle's powertrain warranty covers sensor issues.

Historical data

This code has been associated with vehicles experiencing shifting issues due to sensor voltage problems.

Urgency level

Moderate – It should be addressed soon to avoid potential transmission damage.

Testing conditions

• Vehicle at operating temperature

• Transmission in Park or Neutral

Component location

The transmission range sensor is typically located on the transmission housing.

FAQs

Q: Can I drive with a P18E5 code?
A: It's not recommended, as it may cause transmission shifting issues.

Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are completed.

Optional diagnostic gear

Tools that may help diagnose P18E5

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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