AutoCodes – Generic – P1FEC

P1FEC 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 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.

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Code Popularity 1,227

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

What does this mean?

What are the Possible Causes of the DTC P1FEC?

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?

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 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 code?

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Need Help with the Code?

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Information for Specific Makes

P1FEC Buick — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance
P1FEC Cadillac — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance
P1FEC Chevrolet — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance
P1FEC GMC — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance
P1FEC Saturn — Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance

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 Code

1. What are the common symptoms of OBDII code P1FEC (Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Performance)?

- Common symptoms include decreased fuel efficiency, loss of power, and potential issues with the hybrid or electric vehicle battery.

2. What are the possible causes of OBDII code P1FEC?

- Possible causes include a faulty battery interface control module, issues with the voltage sensor, wiring or connector problems, or a malfunctioning hybrid or electric vehicle battery.

3. How can I diagnose the OBDII code P1FEC?

- Diagnosis typically involves using a professional OBDII scanner to read the code and then performing further testing on the battery interface control module, voltage sensor, and related components.

4. What are some repair tips for resolving OBDII code P1FEC?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the faulty voltage sensor, recalibrating the battery interface control module, or resetting the system.

5. Can OBDII code P1FEC be ignored or reset without performing repairs?

- Ignoring or resetting the code without addressing the underlying issue can lead to further problems with the hybrid or electric vehicle system. It is recommended to diagnose and repair the issue promptly.

6. How serious is OBDII code P1FEC?

- OBDII code P1FEC should be taken seriously as it indicates a potential issue with the hybrid or electric vehicle system, which can impact performance and fuel efficiency.

7. Is it safe to continue driving with OBDII code P1FEC present?

- It is not recommended to continue driving with OBDII code P1FEC present, as it can lead to further damage to the vehicle's systems and components.

8. How much does it typically cost to repair OBDII code P1FEC?

- The cost of repairing OBDII code P1FEC can vary depending on the specific issue, parts needed, and labor costs. It is advisable to consult a professional technician for an accurate estimate.

9. Can I prevent OBDII code P1FEC from occurring in the future?

- Regular maintenance, including checking the battery interface control module, voltage sensor, and related components, can help prevent OBDII code P1FEC from occurring in the future.

10. Are there any recalls or technical service bulletins related to OBDII code P1FEC?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to OBDII code P1FEC to see if there are known issues and solutions available.