AutoCodes – Generic – P1E8C

P1E8C Code - Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low 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
P1E8C indicates Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low 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.
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Code Popularity 1,014
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 24, 2020
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Code P1E8C 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 P1E8C - Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage - AutoCodes.com
P1E8C Code - Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage

What are the Possible Causes of the DTC P1E8C?

  • 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 P1E8C?

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 P1E8C 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 P1E8C code?

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Information for Specific Makes

  • P1E8C Buick β€” Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage
  • P1E8C Cadillac β€” Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage
  • P1E8C Chevrolet β€” Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage
  • P1E8C GMC β€” Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage
  • P1E8C Saturn β€” Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage
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 P1E8C Code

1. What are the common symptoms of OBDII code P1E8C (Hybrid/EV Battery Pack Coolant Pump Enable Circuit Low Voltage)?

- Common symptoms include a check engine light, reduced hybrid/EV system performance, and potential cooling system issues.

2. What can cause the P1E8C code to trigger?

- The code can be triggered by a faulty battery pack coolant pump, a short circuit in the circuit, or low voltage in the enable circuit.

3. How serious is the P1E8C code?

- The code should be addressed promptly as it can affect the cooling system of the hybrid/EV battery pack, potentially leading to battery overheating and performance issues.

4. How can I diagnose the cause of OBDII code P1E8C?

- A thorough inspection of the battery pack coolant pump, enable circuit wiring, and voltage levels with a diagnostic scanner is recommended to diagnose the issue.

5. Can I continue driving with the P1E8C code present?

- It is not recommended to continue driving with the code present, as it can lead to further damage to the hybrid/EV system components.

6. What are some repair tips for resolving the P1E8C code?

- Repair tips include checking and replacing the battery pack coolant pump, inspecting wiring for any shorts, and ensuring proper voltage in the enable circuit.

7. Will resetting the trouble codes make the P1E8C code disappear?

- Resetting the trouble codes may temporarily clear the code, but it is essential to address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIY enthusiast fix the P1E8C code at home?

- While some components like fuses and wiring can be checked by a DIY enthusiast, diagnosing and repairing the specific cause of the P1E8C code may require professional expertise due to the complex nature of hybrid/EV systems.

9. How much does it typically cost to repair OBDII code P1E8C?

- The cost of repairs for the P1E8C code can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor, and diagnostic services.

10. Are there any preventive measures to avoid OBDII code P1E8C in the future?

- Regular maintenance of the hybrid/EV system, including checking coolant pump operation and monitoring voltage levels, can help prevent issues that trigger the P1E8C code.

Discuss the causes and fixes for P1E8C OBDII Code

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