AutoCodes – GMC – P1EBF GMC

P1EBF GMC Code - Hybrid/EV Battery Multifunction Contactor Stuck Closed

Quick Answer

The hybrid/EV battery contains 5 high voltage contactors and 2 transistors. Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module 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: P1EBF GMC indicates Hybrid/EV Battery Multifunction Contactor Stuck Closed.
Common causes: Common causes include Faulty Battery Energy Control Module, Battery Energy Control Module harness is open or shorted, Battery Energy Control Module 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 789

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 P1EBF GMC Description

The hybrid/EV battery contains 5 high voltage contactors and 2 transistors. The high voltage contactors and transistors 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 consist of 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 consist of the precharge transistor and heater transistor. The contactors and transistors close and open in a specific sequence 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. Ground is provided through the case ground.

OBDII Code P1EBF GMC - Hybrid/EV Battery Multifunction Contactor Stuck Closed - AutoCodes.com — P1EBF GMC Code - Hybrid/EV Battery Multifunction Contactor Stuck Closed

What does this mean?

What are the Possible Causes of the DTC P1EBF GMC?

Faulty Battery Energy Control Module
Battery Energy Control Module harness is open or shorted
Battery Energy Control Module circuit poor electrical connection

How to Fix the DTC P1EBF GMC?

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 P1EBF GMC 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 P1EBF GMC Code

What does the OBDII code P1EBF indicate for GMC vehicles?

The OBDII code P1EBF indicates that the hybrid or electric vehicle's battery multifunction contactor is stuck closed, which may prevent proper battery operation.

What are common symptoms associated with the P1EBF code?

Common symptoms include reduced power output, warning lights on the dashboard, and potential inability to start the vehicle.

What could cause the P1EBF code to trigger?

Causes may include a faulty multifunction contactor, issues with wiring or connectors, or problems within the battery management system.

How can I diagnose the issue related to the P1EBF code?

To diagnose the issue, you can use an OBDII scanner to confirm the code, inspect the contactor and related wiring for damage, and check for any additional codes that may provide further insight.

What are potential repair solutions for the P1EBF code?

Repair solutions may include replacing the multifunction contactor, repairing damaged wiring, or addressing issues in the battery management system.

Can I drive my GMC vehicle with the P1EBF code active?

It is not advisable to drive the vehicle with this code active, as it can lead to battery performance issues and may pose safety risks.

How can I reset the P1EBF code after repairs?

After performing the necessary repairs, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a short period.

Is it safe to work on the hybrid or EV battery system myself?

Working on the hybrid or EV battery system can be dangerous due to high voltage components; it's recommended to consult a professional mechanic for repairs.

What should I do if the P1EBF code returns after repairs?

If the code returns, further diagnosis may be required to identify any underlying issues that were not addressed during the initial repair.