AutoCodes – Buick – P1EC6 Buick

P1EC6 Buick 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 Buick 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 840

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

What does this mean?

What are the Possible Causes of the DTC P1EC6 Buick?

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 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 P1EC6 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.

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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 P1EC6 Buick Code

1. What are common symptoms of OBDII code P1EC6 Buick related to Hybrid/EV Battery Pack Heater Performance?

- Common symptoms include decreased battery performance, difficulty charging the battery, and possible illumination of the check engine light.

2. What are the possible causes of OBDII code P1EC6 Buick indicating Hybrid/EV Battery Pack Heater Performance issues?

- Causes may include a faulty battery pack heater, a malfunctioning temperature sensor, issues with the heater control module, or wiring problems.

3. How can I diagnose the OBDII code P1EC6 Buick for Hybrid/EV Battery Pack Heater Performance problems?

- A thorough diagnostic scan using an OBDII scanner is necessary to pinpoint the exact issue. Checking the battery pack heater, temperature sensor, and related components is also recommended.

4. Is it safe to continue driving with OBDII code P1EC6 Buick indicating Hybrid/EV Battery Pack Heater Performance problems?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the battery pack and affect the overall performance of the hybrid or electric system.

5. What repairs are typically needed to address OBDII code P1EC6 Buick related to Hybrid/EV Battery Pack Heater Performance?

- Repairs may involve replacing the faulty battery pack heater, repairing or replacing the temperature sensor, checking and repairing wiring issues, or resetting the heater control module.

6. Can I reset the OBDII code P1EC6 Buick for Hybrid/EV Battery Pack Heater Performance myself?

- While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent further problems with the battery pack heater.

7. Are there any preventive maintenance tips to avoid OBDII code P1EC6 Buick for Hybrid/EV Battery Pack Heater Performance?

- Regularly inspecting the battery pack heater, checking the temperature sensor, and ensuring proper functioning of the heater control module can help prevent issues leading to this code.

8. How important is it to address OBDII code P1EC6 Buick related to Hybrid/EV Battery Pack Heater Performance promptly?

- Promptly addressing this code is crucial to prevent damage to the battery pack, maintain optimal performance of the hybrid or electric system, and avoid potential safety hazards.

9. Can extreme weather conditions affect the occurrence of OBDII code P1EC6 Buick for Hybrid/EV Battery Pack Heater Performance?

- Yes, extreme cold temperatures can put additional strain on the battery pack heater, increasing the likelihood of issues leading to this OBDII code.

10. Should I seek professional help to diagnose and repair OBDII code P1EC6 Buick related to Hybrid/EV Battery Pack Heater Performance?

- It is recommended to consult a certified mechanic or dealership with experience in hybrid or electric vehicles to accurately diagnose and repair issues associated with this OBDII code.