AutoCodes – Buick – P1FEC Buick

P1FEC Buick Code - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance

Quick Answer

The hybrid battery contains 192 individual cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface 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: P1FEC Buick indicates Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 892

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 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1FEC Buick Description

The hybrid battery contains 192 individual cells. Two cells are welded together in parallel and called a cell group. There are a total of 96 cell groups in the hybrid battery assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cell groups are joined to form 3 distinct sections. The first 24 battery cell groups make up battery section 1. This section is adjacent to the cowl and contains battery cell groups 73 through 96. The next 28 battery cell groups make up battery section 2. This section is located behind section 1 and contains battery cell groups 45 through 72. The transverse battery section is section number 3 and it contains the remaining 44 battery cell groups 1 through 44. The battery sections also contain two temperature sensors, with one sensor located at each end of the section.
The battery energy control module monitors the voltage of the 96 battery cell groups. The voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A voltage sense harness joins this connector to the battery energy control module.
The battery energy control module contains internal interface control modules that monitor specific cell groups.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to the hybrid powertrain control module 2 through serial data. The hybrid powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1FEC Buick - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance - AutoCodes.com — P1FEC Buick Code - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FEC Buick?

Faulty Hybrid/EV Battery Interface Control Module
Hybrid/EV Battery Interface Control Module harness is open or shorted
Hybrid/EV Battery Interface Control Module circuit poor electrical connection

How to Fix the DTC P1FEC Buick?

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 P1FEC Buick 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 P1FEC Buick code?

Need more information on how to fix the P1FEC Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1FEC Buick 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 P1FEC Buick Code

1. What are common symptoms of OBDII code P1FEC in a Buick related to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- Common symptoms include reduced hybrid system performance, illuminated warning lights on the dashboard, and potential issues with battery charging.

2. What are possible causes of OBDII code P1FEC in a Buick indicating an issue with the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- Possible causes include a faulty voltage sensor, damaged wiring or connectors, software glitches, or issues with the hybrid battery itself.

3. How can I diagnose the OBDII code P1FEC in my Buick if it relates to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- Diagnosis typically involves using a professional OBDII scanner to read the code, checking the voltage sensor's readings, inspecting wiring connections, and performing battery tests.

4. Can I continue driving my Buick with OBDII code P1FEC related to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- It is not recommended to continue driving the vehicle with this code as it can lead to further damage to the hybrid system components. It is best to address the issue promptly.

5. What are the repair options for fixing OBDII code P1FEC in a Buick linked to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- Repair options may include replacing the faulty voltage sensor, repairing damaged wiring or connectors, updating software, or addressing any underlying issues with the hybrid battery.

6. Is it possible to reset OBDII code P1FEC in a Buick related to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- While you may be able to clear the code temporarily, it is crucial to diagnose and address the root cause of the issue to prevent the code from reoccurring.

7. How can I prevent OBDII code P1FEC from appearing in my Buick due to issues with the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- Regular maintenance of the hybrid system, timely inspections, and addressing any warning signs promptly can help prevent this code from appearing.

8. What safety precautions should I consider when working on the Hybrid/EV Battery Interface Control Module in my Buick to resolve OBDII code P1FEC?

- Ensure the vehicle is turned off, disconnect the hybrid battery, wear appropriate safety gear, and refer to the vehicle's service manual for specific instructions.

9. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P1FEC related to the Hybrid/EV Battery Interface Control Module in a Buick?

- While some basic troubleshooting can be done, diagnosing and repairing issues with the hybrid system typically require specialized tools and expertise best handled by a professional technician.

10. How much does it cost to repair OBDII code P1FEC in a Buick if it pertains to the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance?

- Repair costs can vary depending on the exact cause of the issue, but it is advisable to consult a qualified mechanic for an accurate diagnosis and cost estimate.