AutoCodes – GMC – P1E18 GMC

P1E18 GMC 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 GMC 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 733

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

What does this mean?

What are the Possible Causes of the DTC P1E18 GMC?

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 GMC?

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 GMC 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 GMC Code

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

- Common symptoms include transmission shifting issues, illuminated warning lights on the dashboard, and reduced vehicle performance.

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

- Possible causes may include a faulty transmission fluid pump control module, damaged wiring or connectors in the circuit, or a malfunctioning PCM (Powertrain Control Module).

3. How can I diagnose OBDII code P1E18 GMC associated with the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

- Diagnose the code by performing a thorough inspection of the wiring and connectors in the circuit, checking the transmission fluid pump control module for proper functionality, and scanning the PCM for any related trouble codes.

4. What are some repair tips for fixing OBDII code P1E18 GMC related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

- Repair tips may include repairing or replacing damaged wiring or connectors, replacing the faulty transmission fluid pump control module, and ensuring proper connection and communication between the components.

5. Can OBDII code P1E18 GMC be cleared/reset to see if it returns?

- Yes, the code can be cleared/reset using an OBDII scanner. However, it is recommended to diagnose and address the underlying issue causing the code before clearing it to prevent it from reoccurring.

6. Is it safe to continue driving with OBDII code P1E18 GMC related to the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

- It is not recommended to continue driving with this code present, as it can lead to further transmission issues and potential damage. It's best to address the problem promptly to avoid any serious consequences.

7. How much does it typically cost to repair OBDII code P1E18 GMC associated with the Auxiliary Transmission Fluid Pump Control Module 5 Volt Reference Circuit?

- The cost of repairs can vary depending on the specific cause of the issue, the extent of the damage, and labor rates. It is advisable to consult with a qualified mechanic or dealership for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P1E18 GMC on their own, or is professional help recommended?

- While some may attempt to diagnose and repair the issue themselves, dealing with transmission and electrical components can be complex. It is generally recommended to seek professional help to ensure the problem is properly addressed.