AutoCodes – Cadillac – P1E18 Cadillac

P1E18 Cadillac 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 Cadillac 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 1,046

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

What does this mean?

What are the Possible Causes of the DTC P1E18 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are common symptoms of OBDII code P1E18 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

The common symptoms include transmission shifting issues, illuminated warning lights on the dashboard, and potentially harsh shifting.

2. What are possible causes of the OBDII code P1E18 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

Potential causes include a faulty transmission fluid pump control module, damaged wiring or connectors in the circuit, or an issue with the 5-volt reference voltage.

3. How can I diagnose the OBDII code P1E18 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

Diagnosis typically involves using a scan tool to retrieve the specific trouble code, inspecting the wiring and connectors for damage, and testing the voltage in the circuit to pinpoint the issue.

4. What are the repair options for resolving OBDII code P1E18 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

Repair options may include replacing the transmission fluid pump control module, repairing or replacing damaged wiring or connectors, or addressing any issues with the 5-volt reference voltage supply.

5. Can I continue driving my Cadillac with the OBDII code P1E18 related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

It is not recommended to continue driving the vehicle with this issue as it can lead to further transmission damage and potential safety risks. It is best to address the problem promptly.

6. How much does it typically cost to repair OBDII code P1E18 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a few hundred to a couple of thousand dollars, including parts and labor.

7. Are there any preventative maintenance tips to avoid encountering OBDII code P1E18 in a Cadillac related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

Regularly checking and maintaining the transmission system, including fluid levels and condition, can help prevent issues that may trigger this trouble code.

8. Is it safe to clear the OBDII code P1E18 related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit without repairing the underlying issue?

Clearing the code without addressing the root cause can temporarily turn off the warning light, but the issue will likely resurface, potentially leading to more severe problems down the line.