Engine-Codes.com
Engine-Codes – Generic – P1E91

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

Quick Answer

The diagnostic trouble code P1E91 indicates an issue with the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Wiring issues or loose connections, Software glitches or programming errors. 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 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 issues or loose connections, Software glitches or programming errors.
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 Sep 13, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1E91 Description

The diagnostic trouble code P1E91 indicates an issue with the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance. This module is responsible for managing the communication between the vehicle's hybrid or electric battery system and the rest of the vehicle's systems. When this code is triggered, it means that the module is not storing or retrieving data properly, which can lead to various performance issues in the vehicle.

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

Common Causes of P1E91

  1. Faulty Hybrid/EV Battery Interface Control Module
  2. Wiring issues or loose connections
  3. Software glitches or programming errors
  4. Malfunctioning battery pack
  5. Environmental factors such as extreme temperatures affecting the battery system

Symptoms of P1E91

  1. Check Engine Light illuminated
  2. Decreased fuel efficiency
  3. Loss of power or acceleration
  4. Inconsistent hybrid or electric system operation
  5. Vehicle stalling or difficulty starting

How to Fix P1E91

  1. Diagnose the issue using a diagnostic scanner to retrieve the specific fault codes and pinpoint the cause of the problem.
  2. Inspect the Hybrid/EV Battery Interface Control Module and wiring for any visible damage or loose connections. Repair or replace as needed.
  3. Update the software for the module to the latest version to address any potential programming errors.
  4. Test the battery pack and charging system to ensure they are functioning correctly.
  5. Clear the fault codes and reset the system to see if the issue has been resolved.

Cost to Fix P1E91

The cost of repairing the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair can range from $200 to $800, while labor costs can range from $100 to $300. Overall, the total repair cost can be anywhere from $300 to $1100. It is important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and the specific diagnosis and repair process required. It is recommended to consult with a qualified technician for a more accurate cost estimate.

Need more information about the P1E91 code?

Need more information on how to fix the P1E91 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E91 code diagnosed by a professional: Find a repair shop in your area

Code P1E91 Information for Specific Makes

  • P1E91 Buick — Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance
  • P1E91 Cadillac — Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance
  • P1E91 Chevrolet — Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance
  • P1E91 GMC — Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance
  • P1E91 Saturn — Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance
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 Code

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

The common symptoms include poor fuel efficiency, reduced power output, and the illumination of the Check Engine Light.

2. What can cause the OBDII code P1E91 to trigger in relation to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

Possible causes include faulty battery interface control module, software issues, wiring problems, or issues with the hybrid/EV battery itself.

3. How can I diagnose the OBDII code P1E91 for the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

Diagnosis involves using a professional OBDII scanner to read the code, checking the battery interface control module for faults, inspecting wiring connections, and testing the hybrid/EV battery for performance.

4. What are the repair options for resolving OBDII code P1E91 for the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

Repair options may include reprogramming the battery interface control module, replacing faulty components, fixing wiring issues, or recalibrating the hybrid/EV battery system.

5. Can I continue driving with the OBDII code P1E91 related to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

It is not recommended to continue driving with this code as it can lead to further damage to the hybrid/EV system and may result in decreased performance and fuel efficiency.

6. How critical is it to address the OBDII code P1E91 for the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance promptly?

It is important to address this code promptly to prevent potential damage to the hybrid/EV system, ensure optimal performance, and avoid more costly repairs in the future.

7. Can a DIY enthusiast repair OBDII code P1E91 related to the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

While some basic troubleshooting can be done by a DIY enthusiast, it is recommended to seek professional help for accurate diagnosis and repair of this code due to the complexity of hybrid/EV systems.

8. How often does OBDII code P1E91 occur in vehicles with Hybrid/EV systems?

OBDII code P1E91 is relatively uncommon but can occur in vehicles with Hybrid/EV systems, especially as they age or if there are underlying issues with the battery interface control module.

9. Are there any preventive maintenance measures to avoid OBDII code P1E91 for the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

Regularly scheduled maintenance, such as checking the hybrid/EV system components, ensuring proper battery health, and updating software, can help prevent issues that may trigger this code.

10. How can a professional technician reset the OBDII code P1E91 for the Hybrid/EV Battery Interface Control Module 1 Long Term Memory Performance?

A professional technician can reset the code using a diagnostic scanner after performing the necessary repairs or maintenance to address the root cause of the issue.

Discuss the causes and fixes for P1E91 OBDII Code

Submit a New Comment

Code P1E91 comments

No comments found for this page.