AutoCodes – Chevrolet – P1E28 Chevrolet

P1E28 Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage

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 Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module harness is open or shorted. 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: P1E28 Chevrolet indicates Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage.
Common causes: Common causes include Program Power Inverter Module, Faulty Power Inverter Module, Power Inverter Module harness is open or shorted.
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 849

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 P1E28 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 drive motor control module monitors its internal high voltage sensor for correct operation, 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 P1E28 Chevrolet - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage - AutoCodes.com — P1E28 Chevrolet Code - Auxiliary Transmission Fluid Pump Control Module Hybrid/EV Battery System Voltage

What does this mean?

What are the Possible Causes of the DTC P1E28 Chevrolet?

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

How to Fix the DTC P1E28 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 P1E28 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 P1E28 Chevrolet Code

1. What are the common symptoms of OBDII code P1E28 in a Chevrolet vehicle?

The common symptoms include the Check Engine Light illuminating, poor fuel efficiency, issues with shifting gears, and potential transmission problems.

2. What can cause the OBDII code P1E28 to trigger in a Chevrolet vehicle?

The code P1E28 typically triggers due to a malfunction in the Auxiliary Transmission Fluid Pump Control Module or issues with the Hybrid/EV Battery System Voltage.

3. How serious is the OBDII code P1E28 in a Chevrolet vehicle?

The code P1E28 should be addressed promptly as it can lead to drivability issues and potentially cause further damage to the transmission system if left unresolved.

4. How can I diagnose the OBDII code P1E28 in my Chevrolet?

Diagnosing the code P1E28 usually involves using an OBDII scanner to retrieve the specific fault codes, inspecting the transmission fluid pump module, and checking the battery system voltage.

5. Can I continue driving my Chevrolet with the OBDII code P1E28 present?

It is not recommended to drive your vehicle with the code P1E28 present, as it can affect the performance and reliability of your vehicle. It's best to address the issue as soon as possible.

6. How can I repair the OBDII code P1E28 in my Chevrolet?

Repairing the code P1E28 may involve replacing the faulty Auxiliary Transmission Fluid Pump Control Module, addressing any issues with the Hybrid/EV Battery System Voltage, and clearing the fault codes.

7. Are there any DIY tips for fixing the OBDII code P1E28 in a Chevrolet?

While some basic troubleshooting steps can be taken, addressing the code P1E28 often requires specialized tools and knowledge, so it is recommended to seek professional help for proper diagnosis and repair.

8. Can a faulty battery system voltage cause the OBDII code P1E28 to appear in a Chevrolet?

Yes, a malfunction in the Hybrid/EV Battery System Voltage can lead to the triggering of the OBDII code P1E28, as it can impact the operation of the Auxiliary Transmission Fluid Pump Control Module.

9. How long does it typically take to repair the OBDII code P1E28 in a Chevrolet?

The repair time for the code P1E28 can vary depending on the extent of the issue and the availability of parts. It is advisable to consult with a professional mechanic for a more accurate estimate.

10. Is it necessary to reset the OBDII codes after repairing the issue related to code P1E28 in a Chevrolet?

Yes, it is crucial to reset the OBDII codes after repairing the problem associated with the code P1E28 to clear the fault codes and ensure that the issue has been resolved successfully.