AutoCodes – Generic – P1FC4

P1FC4 Code - Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit

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: P1FC4 indicates Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit.
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 803

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 P1FC4 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 P1FC4 - Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit - AutoCodes.com — P1FC4 Code - Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit

What does this mean?

What are the Possible Causes of the DTC P1FC4?

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 P1FC4?

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 P1FC4 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.

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Information for Specific Makes

P1FC4 Buick — Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit
P1FC4 Cadillac — Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit
P1FC4 Chevrolet — Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit
P1FC4 GMC — Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit

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 P1FC4 Code

1. What are the common symptoms of OBDII code P1FC4 related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

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

2. What are possible causes for OBDII code P1FC4 regarding the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

- Causes can range from a faulty Hybrid/EV Battery Interface Control Module to wiring issues, damaged connectors, or a malfunctioning battery interface control module 6 5 V reference circuit.

3. How can I diagnose the OBDII code P1FC4 related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

- Diagnosing this code may involve using a diagnostic scanner to retrieve the code, inspecting the battery interface control module and related wiring, and conducting voltage tests to pinpoint the issue.

4. Are there any repair tips for fixing OBDII code P1FC4 associated with the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the faulty Hybrid/EV Battery Interface Control Module, and ensuring proper connections and voltage levels in the circuit.

5. Can I drive my vehicle with OBDII code P1FC4 triggered by issues with the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

- It is not recommended to drive the vehicle with this code active, as it may lead to further damage to the hybrid system components and potentially affect the vehicle's performance and safety.

6. How critical is it to address OBDII code P1FC4 related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit promptly?

- It is important to address this code promptly to prevent potential damage to the hybrid system components, ensure optimal vehicle performance, and avoid safety risks associated with a malfunctioning battery interface control module.

7. Can a DIY enthusiast repair OBDII code P1FC4 linked to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

- While some basic checks like inspecting wiring and connectors can be done by a DIY enthusiast, diagnosing and repairing issues with the Hybrid/EV Battery Interface Control Module may require specialized tools and expertise, best handled by a professional technician.

8. What role does the Hybrid/EV Battery Interface Control Module play in the vehicle's hybrid system?

- The Hybrid/EV Battery Interface Control Module is responsible for managing the communication and interaction between the vehicle's battery system and the hybrid powertrain components, ensuring efficient operation and performance.

9. Are there any recalls or technical service bulletins related to OBDII code P1FC4 and the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

- It is recommended to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to this specific OBDII code and component to stay informed about potential known issues and remedies.

10. How can regular maintenance help prevent issues with the Hybrid/EV Battery Interface Control Module triggering OBDII code P1FC4?

- Regular maintenance, including scheduled inspections of the hybrid system components, battery system checks, and keeping up with recommended service intervals, can help identify and address potential issues early, reducing the likelihood of triggering this code.