Engine-CodesChevrolet – P1E28 Chevrolet

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

Quick Answer

The P1E28 code for Chevrolet vehicles refers to an issue with the Auxiliary Transmission Fluid Pump Control Module in the Hybrid/EV Battery System Voltage. Common causes include Faulty Auxiliary Transmission Fluid Pump Control Module, Low battery voltage, Wiring or connection issues. 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 Faulty Auxiliary Transmission Fluid Pump Control Module, Low battery voltage, Wiring or connection issues.
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.
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P1E28 Chevrolet Description

The P1E28 code for Chevrolet vehicles refers to an issue with the Auxiliary Transmission Fluid Pump Control Module in the Hybrid/EV Battery System Voltage. This code indicates a problem with the control module that manages the auxiliary transmission fluid pump in hybrid or electric vehicles. The auxiliary transmission fluid pump is responsible for maintaining proper fluid pressure in the transmission system, ensuring smooth gear shifts and optimal performance.

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

Common Causes of P1E28 Chevrolet

  1. Faulty Auxiliary Transmission Fluid Pump Control Module
  2. Low battery voltage
  3. Wiring or connection issues
  4. Hybrid/EV battery system malfunction
  5. Software or programming errors

Symptoms of P1E28 Chevrolet

  1. Erratic shifting behavior
  2. Harsh gear changes
  3. Transmission slipping
  4. Reduced fuel efficiency
  5. Check Engine Light illuminated

How to Fix P1E28 Chevrolet

  1. Diagnose the exact cause of the P1E28 code using a diagnostic scanner to pinpoint the issue.
  2. Inspect the Auxiliary Transmission Fluid Pump Control Module for any signs of damage or malfunction.
  3. Check the battery voltage and connections to ensure they are within the specified range.
  4. Repair or replace any faulty components, such as the control module, wiring, or battery system.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1E28 Chevrolet

The typical repair costs for addressing the P1E28 code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the repair for this code can range from $200 to $600, including parts and labor. However, it's important to note that the actual cost may differ based on factors such as the vehicle's make and model, the location of the repair shop, and the hourly labor rates. It is recommended to consult with a qualified mechanic or dealership to get an accurate estimate for repairing this issue.

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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.

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