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P1E91 GMC Code - Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance

Quick Answer

The P1E91 diagnostic trouble code (DTC) for GMC vehicles relates to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Wiring or connection issues, Software malfunction. 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
P1E91 GMC indicates Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance.
Common causes
Common causes include Faulty Hybrid/EV Battery Interface Control Module, Wiring or connection issues, Software malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P1E91 GMC Description

The P1E91 diagnostic trouble code (DTC) for GMC vehicles relates to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance. This code indicates that there is an issue with the control module's ability to store and retrieve long-term data effectively. The Hybrid/EV Battery Interface Control Module plays a crucial role in managing and monitoring the high-voltage battery system in hybrid and electric vehicles.

OBDII Code P1E91 GMC - Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance
P1E91 GMC Code - Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance

Common Causes of P1E91 GMC

  1. Faulty Hybrid/EV Battery Interface Control Module
  2. Wiring or connection issues
  3. Software malfunction
  4. High-voltage battery system fault
  5. Environmental factors affecting battery performance

Symptoms of P1E91 GMC

  1. Check Engine Light illuminated
  2. Reduced fuel efficiency
  3. Loss of power or acceleration
  4. Erratic behavior of hybrid or electric system
  5. Inability to switch between driving modes

How to Fix P1E91 GMC

  1. Perform a thorough diagnostic scan to confirm the P1E91 code and identify any additional related codes.
  2. Inspect the Hybrid/EV Battery Interface Control Module for physical damage or signs of malfunction.
  3. Check wiring connections and harnesses for any loose connections or corrosion.
  4. Update the control module software if necessary.
  5. Test the high-voltage battery system for any faults or irregularities.

Cost to Fix P1E91 GMC

The typical repair costs for addressing the P1E91 code can vary depending on the exact cause of the issue. In general, repairs related to the Hybrid/EV Battery Interface Control Module can range from $200 to $800, including parts and labor. However, this estimate is just a rough guideline, and actual costs can be influenced by factors such as location, vehicle make and model, and specific repair shop rates. It's recommended to consult with a qualified mechanic or dealership for a more accurate cost estimate.

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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 P1E91 GMC Code

1. What are common symptoms of OBDII code P1E91 in a GMC related to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance issue?

The common symptoms include poor fuel efficiency, reduced electric driving range, and potential failure to start the vehicle.

2. What are the possible causes of OBDII code P1E91 in a GMC Hybrid/EV system?

Potential causes of this code may include a faulty Hybrid/EV Battery Interface Control Module, software issues, wiring problems, or issues with the hybrid battery itself.

3. How can I diagnose the OBDII code P1E91 in my GMC related to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

Diagnosis usually involves using a professional OBDII scanner to read the code and further troubleshooting using manufacturer-specific diagnostic procedures.

4. Can I continue driving my GMC with the OBDII code P1E91 related to the Hybrid/EV Battery Interface Control Module issue?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the hybrid system and potentially leave you stranded.

5. What are some repair tips for fixing the OBDII code P1E91 in a GMC Hybrid/EV system?

Repair tips may include checking and repairing any wiring issues, updating software if applicable, replacing the Hybrid/EV Battery Interface Control Module if necessary, and ensuring the hybrid battery is functioning correctly.

6. Is it possible to reset the OBDII code P1E91 in a GMC Hybrid/EV system without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely reoccur if not properly repaired.

7. How much does it typically cost to repair the OBDII code P1E91 related to the Hybrid/EV Battery Interface Control Module in a GMC?

Repair costs can vary depending on the specific cause of the issue, but it is advisable to consult a professional mechanic or dealership for an accurate diagnosis and cost estimate.

8. Are there any recalls or technical service bulletins related to the OBDII code P1E91 in GMC vehicles?

It is recommended to check with your local GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or bulletins for this specific code in your vehicle.

9. How can regular maintenance help prevent the occurrence of OBDII code P1E91 in a GMC Hybrid/EV system?

Regular maintenance, such as keeping the hybrid battery system well maintained and up to date with software updates, can help prevent issues that may trigger the P1E91 code.

10. Can I fix the OBDII code P1E91 related to the Hybrid/EV Battery Interface Control Module issue in my GMC at home, or do I need to take it to a professional mechanic?

While some simple checks like inspecting wiring connections can be done at home, diagnosing and repairing complex issues related to the Hybrid/EV system are best left to experienced professionals with the proper tools and knowledge.

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