AutoCodes – Generic – P1E18

P1E18 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,332

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P1E18?

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?

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 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.

Need more information about the P1E18 code?

Need more information on how to fix the P1E18 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E18 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1E18 Buick — Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit
P1E18 Cadillac — Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit
P1E18 Chevrolet — Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit
P1E18 GMC — Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit
P1E18 Saturn — Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit

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 Code

1. What are common symptoms of OBDII code P1E18?

Common symptoms of OBDII code P1E18 may include transmission shifting issues, illuminated warning lights on the dashboard, and reduced vehicle performance.

2. What could cause the OBDII code P1E18 to appear?

The OBDII code P1E18, related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit, can be triggered by issues such as a faulty control module, wiring problems, or a malfunctioning transmission fluid pump.

3. How can I diagnose the cause of OBDII code P1E18?

To diagnose the cause of OBDII code P1E18, it is recommended to perform a thorough inspection of the transmission fluid pump control module, check the wiring for any damage, and test the electrical connections for proper voltage.

4. What are the potential dangers of ignoring OBDII code P1E18?

Ignoring OBDII code P1E18 can lead to further damage to the transmission system, potential safety hazards due to unpredictable vehicle performance, and ultimately result in costly repairs down the line.

5. Can I continue driving with OBDII code P1E18 present?

It is not advisable to continue driving with OBDII code P1E18 present, as it can impact the overall drivability of the vehicle and potentially cause further damage to the transmission system.

6. How can I repair OBDII code P1E18?

Repairing OBDII code P1E18 involves diagnosing the root cause of the issue, which may require replacing the faulty transmission fluid pump control module, repairing damaged wiring, or addressing any other related component failures.

7. Are there any DIY fixes for OBDII code P1E18?

While some basic troubleshooting steps can be taken, resolving OBDII code P1E18 often requires specialized diagnostic equipment and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.

8. How much does it cost to fix OBDII code P1E18?

The cost of fixing OBDII code P1E18 can vary depending on the extent of the damage, the specific components that need to be replaced, and labor costs. It is advisable to obtain quotes from reputable auto repair shops for an accurate estimate.

9. Can a faulty transmission fluid pump cause OBDII code P1E18?

Yes, a faulty transmission fluid pump can cause OBDII code P1E18 to appear, as the control module relies on the pump for proper operation. It is important to address any issues with the transmission fluid pump promptly.

10. Is OBDII code P1E18 a common issue in certain vehicle makes and models?

OBDII code P1E18 related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit can be more prevalent in certain vehicle makes and models that are equipped with this specific component. It is advisable to check for any manufacturer recalls or technical service bulletins related to this code.