AutoCodes – GMC – P1EFF GMC

P1EFF GMC Code - Battery Charger Input Power Up Protection Circuit Performance

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: P1EFF GMC indicates Battery Charger Input Power Up Protection Circuit Performance.
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 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 P1EFF 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 Diagnostic Trouble Code (DTC) information. This DTC is for the battery charger are internal measurements that verify the charger is performing properly. The battery charger measures internal voltages, currents, and temperatures and verifies they are within the proper range.

OBDII Code P1EFF GMC - Battery Charger Input Power Up Protection Circuit Performance - AutoCodes.com — P1EFF GMC Code - Battery Charger Input Power Up Protection Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1EFF GMC?

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

How to Fix the DTC P1EFF 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 P1EFF 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 P1EFF 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 P1EFF GMC Code

1. What are the common symptoms of OBDII code P1EFF in a GMC vehicle?

The common symptoms of OBDII code P1EFF in a GMC vehicle include difficulty starting the engine, reduced battery charging, and potential illumination of the battery warning light on the dashboard.

2. What causes the OBDII code P1EFF in a GMC vehicle?

The OBDII code P1EFF in a GMC vehicle is typically caused by issues with the battery charger input power up protection circuit, which may involve faulty wiring, sensors, or components related to the charging system.

3. How can I diagnose the OBDII code P1EFF in my GMC vehicle?

Diagnosing the OBDII code P1EFF in a GMC vehicle involves using a diagnostic scanner to retrieve the trouble code, inspecting the battery charging system for any visible damage or loose connections, and testing the relevant components for proper functionality.

4. What are some repair tips for fixing the OBDII code P1EFF in a GMC vehicle?

Some repair tips for addressing the OBDII code P1EFF in a GMC vehicle include checking and repairing any damaged wiring or connectors, replacing faulty sensors or components in the charging system, and ensuring proper grounding of the circuit.

5. Can I continue driving my GMC vehicle with the OBDII code P1EFF?

It is not recommended to continue driving your GMC vehicle with the OBDII code P1EFF present, as it may lead to further electrical issues, battery drainage, or potential stalling of the engine. It is best to address the problem promptly.

6. How much does it typically cost to repair the OBDII code P1EFF in a GMC vehicle?

The cost of repairing the OBDII code P1EFF in a GMC vehicle can vary depending on the extent of the issue, the specific components that need replacement, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics.

7. Are there any preventive measures to avoid the OBDII code P1EFF in a GMC vehicle?

To help prevent the OBDII code P1EFF in a GMC vehicle, it is recommended to perform regular maintenance checks on the battery charging system, ensure proper installation of any aftermarket electrical accessories, and address any warning signs promptly.

8. Can a DIY enthusiast fix the OBDII code P1EFF in a GMC vehicle?

While some DIY enthusiasts may have the skills to diagnose and repair the OBDII code P1EFF in a GMC vehicle, it is crucial to have a good understanding of automotive electrical systems and access to the necessary tools and resources to ensure a successful repair.

9. How long does it take to repair the OBDII code P1EFF in a GMC vehicle?

The time required to repair the OBDII code P1EFF in a GMC vehicle can vary depending on the complexity of the issue, the availability of replacement parts, and the expertise of the mechanic. It is advisable to consult with a professional for an accurate estimate.

10. Is the OBDII code P1EFF a serious issue in a GMC vehicle?

The OBDII code P1EFF in a GMC vehicle may not be considered a severe issue initially, but ignoring the underlying problem can lead to more significant electrical issues and potential breakdowns. It is important to address the code promptly to avoid further complications.