AutoCodes – Buick – P1E8D Buick

P1E8D Buick Code - Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage

Quick Answer

The hybrid/EV battery pack coolant pump circulates coolant through the drive motor battery coolant radiator, drive motor battery coolant cooler and the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. Common causes include Faulty Hybrid/EV Battery Pack Coolant Pump, Hybrid/EV Battery Pack Coolant Pump harness is open or shorted, Hybrid/EV Battery Pack Coolant Pump 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
P1E8D Buick indicates Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage.
Common causes
Common causes include Faulty Hybrid/EV Battery Pack Coolant Pump, Hybrid/EV Battery Pack Coolant Pump harness is open or shorted, Hybrid/EV Battery Pack Coolant Pump 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,115
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 24, 2020
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P1E8D Buick Description

The hybrid/EV battery pack coolant pump circulates coolant through the drive motor battery coolant radiator, drive motor battery coolant cooler and the hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. An enable signal from the hybrid/EV powertrain control module 2 to the hybrid/EV battery pack coolant pump provides overall control of the pump. When this circuit is high, the pump can operate. The pump is controlled with a pulse-width modulated signal from the hybrid/EV powertrain control module 2 to the hybrid/EV battery pack coolant pump. The higher the duty cycle the higher the pump speed. The hybrid/EV battery pack coolant pump provides a hard-wired pulse-width modulated feedback signal to the hybrid/EV powertrain control module 2. During normal operation, this feedback signal provides pump speed information to the hybrid/EV powertrain control module 2. The hybrid/EV battery pack coolant pump has some self-diagnostic capability. If the hybrid/EV battery pack coolant pump determines there is an internal fault it provides this information on this same feedback circuit instead of pump speed information.
OBDII Code P1E8D Buick - Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage - AutoCodes.com
P1E8D Buick Code - Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage

What are the Possible Causes of the DTC P1E8D Buick?

  • Faulty Hybrid/EV Battery Pack Coolant Pump
  • Hybrid/EV Battery Pack Coolant Pump harness is open or shorted
  • Hybrid/EV Battery Pack Coolant Pump circuit poor electrical connection

How to Fix the DTC P1E8D Buick?

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 P1E8D Buick 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.

Need more information about the P1E8D Buick code?

Need more information on how to fix the P1E8D Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1E8D Buick code diagnosed by a professional: Find a repair shop in your area

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 P1E8D Buick Code

1. What are the common symptoms of OBDII code P1E8D in a Buick Hybrid/EV?

- Common symptoms include the Check Engine light illuminating, reduced hybrid performance, and potential overheating of the hybrid/EV battery pack.

2. What can cause the Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage fault code in a Buick?

- This code is typically triggered by a malfunction in the coolant pump enable circuit, high voltage issues within the battery pack, or a faulty sensor.

3. How serious is the P1E8D fault code in a Buick Hybrid/EV and should it be addressed immediately?

- It is important to address this code promptly as it can lead to overheating of the battery pack, potentially resulting in damage to the hybrid/EV system.

4. What are some DIY repair tips for addressing the Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage code?

- DIY repair options may include checking and replacing faulty fuses, inspecting wiring for damage, and ensuring proper coolant levels in the system.

5. Can driving with the P1E8D code present cause further damage to the vehicle?

- Continuing to drive with this fault code present can potentially lead to more severe issues such as battery pack damage or complete system failure.

6. How can a mechanic diagnose the specific cause of the P1E8D fault code in a Buick Hybrid/EV?

- A mechanic can perform a thorough inspection of the coolant pump circuit, battery pack voltage levels, and sensor functionality using specialized diagnostic tools.

7. Is it safe to reset the OBDII code P1E8D in a Buick Hybrid/EV without addressing the underlying issue?

- Simply resetting the code without addressing the root cause may temporarily turn off the Check Engine light, but the issue will likely resurface and should be properly diagnosed and repaired.

8. Are there any recalls or service bulletins related to the P1E8D code for Buick Hybrid/EV models?

- It's advisable to check with the manufacturer or authorized dealerships for any relevant recalls or service bulletins related to this specific fault code.

9. How much should I expect to pay for professional repairs related to the OBDII code P1E8D in a Buick Hybrid/EV?

- The cost of repairs can vary depending on the specific issue, but it's recommended to get a diagnostic assessment from a qualified technician to determine the exact cost.

10. Can regular maintenance help prevent the occurrence of the Hybrid/EV Battery Pack Coolant Pump Enable Circuit High Voltage fault code in a Buick?

- Regular maintenance, including checking coolant levels, inspecting wiring, and monitoring battery pack health, can help prevent issues that may trigger this fault code.

Discuss the causes and fixes for P1E8D Buick OBDII Code

Code P1E8D Buick comments

No comments found for this page.

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