AutoCodes – Cadillac – P1FC4 Cadillac

P1FC4 Cadillac 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 Cadillac 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.

Save to My Repairs My Repairs

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

Code Popularity 834

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

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 Cadillac?

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 Cadillac 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 P1FC4 Cadillac code?

Need more information on how to fix the P1FC4 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1FC4 Cadillac 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 P1FC4 Cadillac Code

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

The common symptoms include issues with the hybrid or electric vehicle battery charging, reduced vehicle performance, and warning lights illuminated on the dashboard.

2. What are possible causes of OBDII code P1FC4 in a Cadillac related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

Possible causes include a malfunctioning battery interface control module, wiring or connection issues in the 6 5 V reference circuit, or a faulty hybrid/EV battery pack.

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

Diagnosis typically involves using a diagnostic scanner to retrieve the specific fault codes, conducting visual inspections of the wiring and connections, and performing voltage tests on the 6 5 V reference circuit components.

4. Can I still drive my Cadillac with the OBDII code P1FC4 related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the hybrid/EV system and potentially affect the vehicle's drivability and safety.

5. What are some repair tips for addressing OBDII code P1FC4 in a Cadillac related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

Repair tips may include checking and repairing any damaged wiring or connections, replacing the faulty battery interface control module, and testing the hybrid/EV battery pack for any issues.

6. Is it safe to attempt DIY repairs for OBDII code P1FC4 in a Cadillac related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

Due to the complexity of hybrid and electric vehicle systems, it is recommended to seek professional help from a qualified technician or dealership to properly diagnose and repair this code.

7. How much does it cost to repair OBDII code P1FC4 in a Cadillac related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor costs, and diagnostic fees.

8. Can the OBDII code P1FC4 related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit be intermittent?

Yes, intermittent issues with the 6 5 V reference circuit or related components can sometimes trigger the OBDII code P1FC4 sporadically, making diagnosis and repair more challenging.

9. Will resetting the OBDII codes clear the P1FC4 code related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

While clearing the codes may temporarily turn off the warning lights, the underlying issue causing the P1FC4 code will still need to be diagnosed and repaired to prevent it from reoccurring.

10. How long does it take to repair OBDII code P1FC4 in a Cadillac related to the Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit?

The repair time can vary based on the extent of the issue and the availability of parts, but it may take a few hours to a full day to properly diagnose and address the problem.