AutoCodes – Generic – P1EC6

P1EC6 Code - Hybrid/EV Battery Pack Heater Performance

Quick Answer

The hybrid/EV battery contains 5 high-voltage contactors and 2 transistors. Common causes include Faulty Hybrid/EV Battery Pack, Hybrid/EV Battery Pack harness is open or shorted, Hybrid/EV Battery Pack 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: P1EC6 indicates Hybrid/EV Battery Pack Heater Performance.
Common causes: Common causes include Faulty Hybrid/EV Battery Pack, Hybrid/EV Battery Pack harness is open or shorted, Hybrid/EV Battery Pack 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 2,767

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 25, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1EC6 Description

The hybrid/EV battery contains 5 high-voltage contactors and 2 transistors. The high-voltage contactors allow the high-voltage DC batteries to be connected to the vehicle or safely contain the high-voltage DC within the hybrid/EV battery assembly. The 5 high-voltage contactors are a main positive high-voltage contactor, main negative high-voltage contactor, charge positive high-voltage contactor, charge negative high-voltage contactor and multi-function high-voltage contactor. The 2 transistors are the precharge transistor and heater transistor. These contactors/transistors close and open in sequence and are controlled by the hybrid/EV powertrain control module 2. The hybrid/EV powertrain control module 2 supplies voltage to the control circuit for the high-voltage contactors/transistors. Earth is provided through the case earth.
The hybrid/EV battery pack coolant heater is mounted to the coolant inlet on the back side of the hybrid/EV battery contactor assembly. The hybrid/EV battery pack coolant heater uses a 360 V power source.
After the ignition is turned ON, the hybrid/EV battery pack coolant heater is commanded ON. The hybrid/EV powertrain control module 2 monitors the temperature change at the hybrid/EV battery pack coolant temperature sensor 1 to determine if the hybrid/EV battery pack coolant heater is functioning properly.

OBDII Code P1EC6 - Hybrid/EV Battery Pack Heater Performance - AutoCodes.com — P1EC6 Code - Hybrid/EV Battery Pack Heater Performance

What does this mean?

What are the Possible Causes of the DTC P1EC6?

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

How to Fix the DTC P1EC6?

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 P1EC6 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 P1EC6 code?

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Need Help with the Code?

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Information for Specific Makes

P1EC6 Buick — Hybrid/EV Battery Pack Heater Performance
P1EC6 Cadillac — Hybrid/EV Battery Pack Heater Performance
P1EC6 Chevrolet — Hybrid/EV Battery Pack Heater Performance
P1EC6 GMC — Hybrid/EV Battery Pack Heater Performance
P1EC6 Saturn — Hybrid/EV Battery Pack Heater 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 P1EC6 Code

1. What are common symptoms of OBDII code P1EC6 (Hybrid/EV Battery Pack Heater Performance)?

- Common symptoms include reduced hybrid/EV system performance, difficulty starting the vehicle in cold weather, and potential warning lights on the dashboard related to the battery pack heater.

2. What could cause the OBDII code P1EC6 to trigger?

- The code P1EC6 may be triggered due to a malfunction in the hybrid/EV battery pack heater system, such as a faulty heater element, temperature sensor, or control module.

3. How can I diagnose the issue related to code P1EC6?

- Diagnosing the issue may require using a professional OBDII scanner to read the code, checking the battery pack heater components for any visible damage or corrosion, and testing the system for proper functionality.

4. Can I still drive my vehicle with the code P1EC6 present?

- It is not recommended to drive the vehicle with code P1EC6 present, as it can potentially lead to further damage to the hybrid/EV battery pack and may affect the overall operation of the vehicle.

5. What are the potential risks of ignoring the OBDII code P1EC6?

- Ignoring the code P1EC6 can result in decreased efficiency of the hybrid/EV system, reduced battery performance, and potential safety hazards related to the battery pack heater not functioning properly.

6. How can I repair OBDII code P1EC6 on my own?

- Repairing code P1EC6 may require professional assistance due to the complexity of the hybrid/EV battery pack heater system. It is recommended to consult a certified mechanic or dealership for proper diagnosis and repair.

7. Are there any maintenance tips to prevent the recurrence of code P1EC6?

- Regular maintenance of the hybrid/EV system, including checking the battery pack heater components for any signs of wear or damage, can help prevent the recurrence of code P1EC6.

8. Can extreme weather conditions affect the performance of the hybrid/EV battery pack heater?

- Yes, extreme cold weather conditions can put additional strain on the battery pack heater, potentially leading to issues that trigger the OBDII code P1EC6.

9. Is the repair of code P1EC6 covered under warranty for hybrid/EV vehicles?

- Depending on the vehicle's warranty coverage, the repair of code P1EC6 may be covered under the hybrid/EV system warranty. It is advisable to check the warranty terms with the vehicle manufacturer or dealership.

10. How long does it typically take to repair OBDII code P1EC6?

- The repair time for code P1EC6 can vary depending on the exact cause of the issue and the availability of replacement parts. It is recommended to consult a professional mechanic for an accurate estimate of the repair time.