AutoCodes – Generic – P1EFB

P1EFB Code - Battery Charger High-Voltage Converter 2 Input Current Too High

Quick Answer

The hybrid/EV powertrain control module 2 monitors the battery charger high-voltage output and current output and ensures they are within the proper range. 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: P1EFB indicates Battery Charger High-Voltage Converter 2 Input Current Too High.
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 1,036

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 P1EFB Description

The hybrid/EV powertrain control module 2 monitors the battery charger high-voltage output and current output and ensures they are within the proper range. The battery charger operates in either a constant current mode or a constant voltage mode. Whichever mode you are in will determine which diagnostic will be run. The battery charger runs constant voltage mode at the beginning and end of the charge cycle and runs constant current mode most of the charging cycle.

OBDII Code P1EFB - Battery Charger High-Voltage Converter 2 Input Current Too High - AutoCodes.com — P1EFB Code - Battery Charger High-Voltage Converter 2 Input Current Too High

What does this mean?

What are the Possible Causes of the DTC P1EFB?

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

How to Fix the DTC P1EFB?

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 P1EFB 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 P1EFB code?

Need more information on how to fix the P1EFB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1EFB code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1EFB Buick — Battery Charger High-Voltage Converter 2 Input Current Too High
P1EFB Cadillac — Battery Charger High-Voltage Converter 2 Input Current Too High
P1EFB Chevrolet — Battery Charger High-Voltage Converter 2 Input Current Too High
P1EFB GMC — Battery Charger High-Voltage Converter 2 Input Current Too High
P1EFB Saturn — Battery Charger High-Voltage Converter 2 Input Current Too High

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 P1EFB Code

1. What are the common symptoms of OBDII code P1EFB?

- Common symptoms include the illumination of the check engine light, reduced engine power, and potential drivability issues.

2. What can cause the OBDII code P1EFB to be triggered?

- The code P1EFB is triggered when the high-voltage converter 2 input current is detected to be too high, indicating a potential fault in the battery charger system.

3. How serious is the OBDII code P1EFB?

- The code P1EFB should be addressed promptly as it can lead to issues with the charging system and affect the vehicle's performance.

4. What are some possible repair tips for OBDII code P1EFB?

- Inspect the high-voltage converter 2 input circuit for any shorts or damage, check the battery charger system for proper functionality, and ensure all connections are secure.

5. Can a faulty battery charger cause the OBDII code P1EFB?

- Yes, a faulty battery charger or issues with the high-voltage converter 2 input can trigger the P1EFB code.

6. How can I diagnose the OBDII code P1EFB at home?

- You can use an OBDII scanner to retrieve the code, then inspect the high-voltage converter 2 input components for any visible damage or loose connections.

7. Is it safe to continue driving with the OBDII code P1EFB present?

- It is not recommended to continue driving with the P1EFB code illuminated, as it can lead to further damage to the charging system and potential safety hazards.

8. Can a DIY enthusiast repair the OBDII code P1EFB?

- Depending on your technical skills and access to tools, some DIY enthusiasts may be able to address the P1EFB code by inspecting and repairing the high-voltage converter 2 input circuit.

9. Will resetting the OBDII code P1EFB make it go away permanently?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the P1EFB code is not addressed, it is likely to reappear.

10. How much does it typically cost to repair the OBDII code P1EFB at a professional mechanic?

- The cost of repairing the P1EFB code can vary depending on the extent of the issue and the labor rates of the mechanic, but it is advisable to budget for diagnostic fees and potential parts replacement.