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P1EC6 Buick Code - Hybrid/EV Battery Pack Heater Performance

- Code Popularity: 653 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1EC6 Buick?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Hybrid/EV Battery Pack
  • Hybrid/EV Battery Pack harness is open or shorted
  • Hybrid/EV Battery Pack circuit poor electrical connection
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How to Fix the DTC P1EC6 Buick?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P1EC6 Buick Questions and Answers: Search here →

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. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

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

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Code P1EC6 Buick comments

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