AutoCodes – Buick – P1FCC Buick

P1FCC Buick Code - Hybrid/EV Battery Interface Control Module 8 Cell Balancing Circuit

Quick Answer

To maintain a similar state of charge on the cell groups, the hybrid/EV powertrain control module 2 looks at the cell group voltages and determines which cell groups need energy removed in order to maintain the battery groups at a similar state of charge. 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: P1FCC Buick indicates Hybrid/EV Battery Interface Control Module 8 Cell Balancing 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 855

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 P1FCC Buick Description

To maintain a similar state of charge on the cell groups, the hybrid/EV powertrain control module 2 looks at the cell group voltages and determines which cell groups need energy removed in order to maintain the battery groups at a similar state of charge. This is known as cell balancing. There is a transistor switched resistor wired in parallel with the cell group internal to the hybrid/EV battery interface control module portion of the battery energy control module. The hybrid/EV powertrain control module 2 sends a command to the hybrid/EV battery energy control module to begin cell balancing.

OBDII Code P1FCC Buick - Hybrid/EV Battery Interface Control Module 8 Cell Balancing Circuit - AutoCodes.com — P1FCC Buick Code - Hybrid/EV Battery Interface Control Module 8 Cell Balancing Circuit

What does this mean?

What are the Possible Causes of the DTC P1FCC 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 P1FCC 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 P1FCC 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.

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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 P1FCC Buick Code

What does OBD-II code P1FCC mean for a Buick?

Code P1FCC indicates an issue with the Hybrid/EV Battery Interface Control Module 8 Cell Balancing Circuit, which may prevent the system from properly managing the battery's voltage levels across cells.

What are the common symptoms of code P1FCC in a Buick?

Symptoms may include the check engine light turning on, reduced hybrid or EV performance, poor fuel efficiency, and potential battery overheating.

What causes the P1FCC code to trigger on a Buick?

Common causes include a faulty battery control module, damaged cell balancing circuits, wiring issues, or a malfunctioning hybrid/EV battery pack.

Can I drive my Buick with the P1FCC code active?

While the vehicle might still operate, driving with this code can risk further damage to the battery system and reduce performance. It’s best to address the issue promptly.

How is code P1FCC diagnosed in a Buick?

A technician will use a diagnostic scan tool to confirm the code, inspect the battery interface module, check connections, and test voltage levels across the battery cells.

What repairs might fix the P1FCC code in a Buick?

Repairs could include replacing the battery interface control module, repairing or replacing damaged wiring, or servicing the hybrid/EV battery pack.

How much does it cost to fix code P1FCC on a Buick?

Repair costs vary but can range from $200 to $1,000 or more, depending on whether the issue involves wiring repairs or module or battery pack replacement.

Can a low auxiliary battery cause the P1FCC code?

No, the P1FCC code is specific to the hybrid/EV battery balancing circuit, not the auxiliary battery. However, overall electrical issues should still be checked.

How can I prevent code P1FCC from reoccurring in my Buick?

Regular maintenance of the hybrid/EV battery system, ensuring clean and secure connections, and addressing any electrical issues promptly can help prevent this code.

Do I need a dealership to fix the P1FCC code on my Buick?

While some independent repair shops can handle hybrid/EV systems, a dealership may have the specialized tools and knowledge required for this specific issue.