AutoCodes – GMC – P1FC4 GMC

P1FC4 GMC 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 GMC 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 762

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

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 GMC?

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 GMC 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 GMC code?

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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 GMC Code

1. What are common symptoms of OBDII code P1FC4 in a GMC vehicle?

The common symptoms include engine performance issues, reduced fuel efficiency, and potential illumination of the Check Engine light.

2. What does the OBDII code P1FC4 for Hybrid/EV Battery Interface Control Module 6 5 V Reference Circuit indicate?

This code indicates a problem with the 6.5V reference circuit of the Hybrid/EV Battery Interface Control Module in a GMC hybrid or electric vehicle.

3. What are possible causes of OBDII code P1FC4 in a GMC vehicle?

Possible causes of this code include a faulty Hybrid/EV Battery Interface Control Module, damaged wiring or connectors in the 6.5V reference circuit, or a weak battery.

4. How can I diagnose the OBDII code P1FC4 in my GMC vehicle?

Diagnosis typically involves using a scan tool to retrieve the code, inspecting the Hybrid/EV Battery Interface Control Module and related components, and testing the 6.5V reference circuit for proper voltage.

5. Can I drive my GMC vehicle with the OBDII code P1FC4 present?

It is not recommended to drive with this code present, as it can lead to further damage to the hybrid or electric system components and potentially cause unsafe driving conditions.

6. How can I repair OBDII code P1FC4 in my GMC vehicle?

Repairing this code may involve replacing the Hybrid/EV Battery Interface Control Module, repairing or replacing damaged wiring or connectors, and ensuring the 6.5V reference circuit is functioning correctly.

7. Is it safe to reset the OBDII code P1FC4 in my GMC vehicle without addressing the underlying issue?

Resetting the code without fixing the underlying issue may temporarily turn off the Check Engine light, but the problem will likely persist and could lead to more severe issues down the line.

8. Are there any recalls or technical service bulletins related to OBDII code P1FC4 in GMC vehicles?

It's recommended to check with a GMC dealership or online resources for any recalls or technical service bulletins related to this specific OBDII code to see if there are known issues or remedies.

9. How long does it typically take to repair OBDII code P1FC4 in a GMC vehicle?

The repair time can vary depending on the exact cause of the code and the availability of parts. It's best to consult with a professional mechanic for a more accurate estimate.

10. Can I prevent OBDII code P1FC4 from occurring in my GMC vehicle?

Regular maintenance, such as checking the hybrid or electric system components and keeping the vehicle's battery in good condition, can help prevent issues that may trigger this particular OBDII code.