AutoCodes – GMC – P1EFD GMC

P1EFD GMC Code - Battery Charger Power Efficiency

Quick Answer

The battery charger will diagnose its own systems and determine when a fault condition is present. Common causes include Faulty Battery Charger, Battery Charger harness is open or shorted, Battery Charger 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: P1EFD GMC indicates Battery Charger Power Efficiency.
Common causes: Common causes include Faulty Battery Charger, Battery Charger harness is open or shorted, Battery Charger 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 746

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 P1EFD GMC Description

The battery charger will diagnose its own systems and determine when a fault condition is present. Diagnostics and system status is communicated from the battery charger to the hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for DTC information.

OBDII Code P1EFD GMC - Battery Charger Power Efficiency - AutoCodes.com — P1EFD GMC Code - Battery Charger Power Efficiency

What does this mean?

What are the Possible Causes of the DTC P1EFD GMC?

Faulty Battery Charger
Battery Charger harness is open or shorted
Battery Charger circuit poor electrical connection

How to Fix the DTC P1EFD 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 P1EFD 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.

Need more information about the P1EFD GMC code?

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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 P1EFD GMC Code

1. What are the common symptoms of OBDII code P1EFD in a GMC related to Battery Charger Power Efficiency?

- Common symptoms may include poor battery charging performance, slow charging times, and potential failure to charge the battery fully.

2. What are the possible causes of OBDII code P1EFD GMC related to Battery Charger Power Efficiency?

- The code could be triggered by issues such as a faulty battery charger, damaged charging cables, poor electrical connections, or a weak battery.

3. How can I diagnose the OBDII code P1EFD in my GMC when it relates to Battery Charger Power Efficiency?

- You can start by checking the battery charger for any visible damage, testing the charging cables for continuity, and ensuring a strong electrical connection between the charger and the battery.

4. Are there any simple repair tips for fixing OBDII code P1EFD in a GMC due to Battery Charger Power Efficiency issues?

- Try cleaning the charging terminals, replacing damaged cables, using a different charger to test, and ensuring the battery is in good condition and properly connected.

5. Can a weak battery cause the OBDII code P1EFD related to Battery Charger Power Efficiency in a GMC?

- Yes, a weak or failing battery can lead to issues with the charging process, triggering the code P1EFD related to Battery Charger Power Efficiency.

6. Should I reset the OBDII code P1EFD in my GMC after addressing Battery Charger Power Efficiency problems?

- Once you have fixed the underlying issues causing the code, you can reset it using an OBDII scanner to clear the fault codes and check if the problem is resolved.

7. Is it safe to continue using the battery charger if the OBDII code P1EFD GMC related to Battery Charger Power Efficiency is triggered?

- It is recommended to address the issue causing the code before continuing to use the battery charger to avoid potential damage to the battery or electrical system.

8. Can a bad electrical connection trigger the OBDII code P1EFD in a GMC related to Battery Charger Power Efficiency?

- Yes, a poor electrical connection between the battery charger and the battery can disrupt the charging process and lead to the code being triggered.

9. What role does the battery charger power efficiency play in triggering the OBDII code P1EFD in a GMC?

- The power efficiency of the battery charger affects its ability to charge the battery effectively, and any inefficiencies can lead to the code being set due to charging issues.

10. Are there any safety precautions to consider when troubleshooting the OBDII code P1EFD GMC related to Battery Charger Power Efficiency?

- Always follow safety guidelines when working with electrical systems, disconnect the charger before inspecting it, and avoid working on the vehicle in wet or hazardous conditions.