AutoCodes – GMC – P1EFE GMC

P1EFE GMC Code - Battery Charger Reverse Polarity Protection Circuit Performance

Quick Answer

The battery charger 14 V output circuit is connected to the vehicle 12 V system. 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: P1EFE GMC indicates Battery Charger Reverse Polarity 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 733

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 P1EFE GMC Description

The battery charger 14 V output circuit is connected to the vehicle 12 V system. The battery charger monitors the 14 V output for proper current and voltage conditions. The battery charger has the ability to drive the voltage to 14 V.

OBDII Code P1EFE GMC - Battery Charger Reverse Polarity Protection Circuit Performance - AutoCodes.com — P1EFE GMC Code - Battery Charger Reverse Polarity Protection Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P1EFE GMC?

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

How to Fix the DTC P1EFE 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 P1EFE 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 P1EFE GMC code?

Need more information on how to fix the P1EFE GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1EFE GMC code diagnosed by a professional: Find a repair shop in your area

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 P1EFE GMC Code

1. What are common symptoms of OBDII code P1EFE GMC related to Battery Charger Reverse Polarity Protection Circuit Performance?

Common symptoms include difficulty starting the vehicle, dim or flickering lights, and potential electrical issues in the vehicle.

2. What could cause the OBDII code P1EFE GMC to trigger for Battery Charger Reverse Polarity Protection Circuit Performance?

The code may be triggered by a faulty battery charger, reversed jumper cable connections, or issues with the reverse polarity protection circuit.

3. How can I diagnose the OBDII code P1EFE GMC for Battery Charger Reverse Polarity Protection Circuit Performance?

Diagnosing involves checking the battery charger connections, inspecting the reverse polarity protection circuit, and testing the overall electrical system.

4. Is it safe to drive with the OBDII code P1EFE GMC related to Battery Charger Reverse Polarity Protection Circuit Performance?

It is not recommended to drive with this code active, as it can lead to electrical malfunctions and potentially harm the vehicle's electrical system.

5. Can I reset the OBDII code P1EFE GMC for Battery Charger Reverse Polarity Protection Circuit Performance on my own?

You can attempt to reset the code by disconnecting the battery for a few minutes or using an OBDII scanner to clear the code after addressing the underlying issue.

6. What are some repair tips for fixing the OBDII code P1EFE GMC for Battery Charger Reverse Polarity Protection Circuit Performance?

Repair tips may include checking and replacing damaged cables, ensuring correct jumper cable connections, and testing the battery charger for proper function.

7. Are there any preventative measures to avoid encountering the OBDII code P1EFE GMC related to Battery Charger Reverse Polarity Protection Circuit Performance?

Preventative measures include double-checking jumper cable connections before charging the battery, using a reliable battery charger, and maintaining the vehicle's electrical system.

8. Can a DIY enthusiast fix the OBDII code P1EFE GMC for Battery Charger Reverse Polarity Protection Circuit Performance?

Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address the issue by following repair guides and safety precautions.

9. What role does the reverse polarity protection circuit play in preventing the OBDII code P1EFE GMC for Battery Charger Reverse Polarity Protection Circuit Performance?

The reverse polarity protection circuit safeguards the vehicle's electrical system by preventing damage from incorrect battery charger connections or reversed polarity.

10. Is professional help recommended for resolving the OBDII code P1EFE GMC related to Battery Charger Reverse Polarity Protection Circuit Performance?

If you are unsure about diagnosing or repairing electrical issues, seeking professional help from a certified mechanic or automotive technician is advisable.