AutoCodes – Chevrolet – P1E18 Chevrolet

P1E18 Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit

Quick Answer

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module 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: P1E18 Chevrolet indicates Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit.
Common causes: Common causes include Faulty Power Inverter Module, Power Inverter Module harness is open or shorted, Power Inverter Module 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 751

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 Apr 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1E18 Chevrolet Description

The power inverter module, often referred to as the drive motor generator power inverter module, contains three motor control modules and the hybrid powertrain control module. Two of the motor control modules operate their respective drive motor generator based upon power inverter module commands. The third motor control module controls the auxiliary transmission fluid pump motor. Each motor control module utilizes a 5 V reference power supply for internal circuit needs. This fault is handled inside the power inverter module and no external circuits are involved. The motor control modules and the hybrid powertrain control module are part of the power inverter module and are not serviced separately.

OBDII Code P1E18 Chevrolet - Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit - AutoCodes.com — P1E18 Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit

What does this mean?

What are the Possible Causes of the DTC P1E18 Chevrolet?

Faulty Power Inverter Module
Power Inverter Module harness is open or shorted
Power Inverter Module circuit poor electrical connection

How to Fix the DTC P1E18 Chevrolet?

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 P1E18 Chevrolet 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.

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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 P1E18 Chevrolet Code

1. What does the OBDII code P1E18 mean on a Chevrolet?

P1E18 indicates a fault in the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit, which is responsible for providing a stable voltage to certain components in the system.

2. What are the common symptoms of code P1E18 on a Chevrolet?

Symptoms may include transmission performance issues, erratic shifting, illuminated check engine light, or the vehicle entering limp mode.

3. What causes the P1E18 code to appear on a Chevrolet?

Common causes include a shorted or open 5-volt reference circuit, a faulty auxiliary transmission fluid pump control module, damaged wiring, or poor electrical connections.

4. How serious is the P1E18 code on a Chevrolet?

It is moderately serious as it can affect transmission operation and vehicle drivability, potentially leading to further damage if not addressed.

5. Can I drive my Chevrolet with the P1E18 code?

Driving with this code is not recommended as it can lead to transmission malfunctions and may worsen the issue over time.

6. How is the P1E18 code diagnosed on a Chevrolet?

A technician will use a scan tool to confirm the code, inspect the 5-volt reference circuit for shorts or opens, and test the auxiliary transmission fluid pump control module for proper operation.

7. What repairs can fix the P1E18 code on a Chevrolet?

Repairs may include fixing or replacing damaged wiring, repairing loose or corroded connections, or replacing the auxiliary transmission fluid pump control module if it is faulty.

8. How much does it cost to fix the P1E18 code on a Chevrolet?

The repair cost depends on the cause but can range from $100 for wiring repairs to $500 or more for replacing the control module.

9. Can a low battery cause the P1E18 code on a Chevrolet?

While unlikely, a weak or failing battery can sometimes create electrical issues that may trigger diagnostic codes, so itâ€™s worth testing the battery.

10. Can I clear the P1E18 code without fixing the issue on my Chevrolet?

You can clear the code with a scan tool, but if the underlying issue is not resolved, the code will likely reappear and continue to cause problems.