AutoCodes – Buick – P1FC7 Buick

P1FC7 Buick Code - Hybrid/EV Battery Interface Control Module 9 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: P1FC7 Buick indicates Hybrid/EV Battery Interface Control Module 9 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 960

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 P1FC7 Buick 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 P1FC7 Buick - Hybrid/EV Battery Interface Control Module 9 5 V Reference Circuit - AutoCodes.com — P1FC7 Buick Code - Hybrid/EV Battery Interface Control Module 9 5 V Reference Circuit

What does this mean?

What are the Possible Causes of the DTC P1FC7 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 P1FC7 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 P1FC7 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 P1FC7 Buick Code

What does the OBDII code P1FC7 mean for a Buick vehicle?

The OBDII code P1FC7 indicates a problem with the Hybrid/EV Battery Interface Control Module, specifically related to the 5 V reference circuit.

What are the common symptoms of the P1FC7 code?

Common symptoms include warning lights on the dashboard, reduced hybrid or electric vehicle performance, and possible issues with battery charging or discharging.

What could cause the P1FC7 code to trigger?

The P1FC7 code can be caused by a faulty Hybrid/EV Battery Interface Control Module, issues with the wiring or connectors in the 5 V reference circuit, or a malfunctioning battery monitoring system.

How can I diagnose the P1FC7 code accurately?

To diagnose the P1FC7 code, use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, and check the Hybrid/EV Battery Interface Control Module for faults.

What are some potential repairs for the P1FC7 code?

Repairs may include replacing a damaged wiring harness, fixing poor connections, replacing the Hybrid/EV Battery Interface Control Module, or recalibrating the battery management system.

Can I drive my Buick if the P1FC7 code is present?

It is not recommended to drive your vehicle with the P1FC7 code, as it may lead to diminished performance and could potentially cause further damage to the hybrid or electric system.

Is the P1FC7 code serious?

Yes, the P1FC7 code is considered serious as it can affect the overall functionality of the hybrid or electric vehicle system, potentially leading to safety concerns.

How much will it cost to repair the P1FC7 code?

Repair costs can vary widely depending on the specific issue, ranging from a simple wiring fix to a more expensive replacement of the Hybrid/EV Battery Interface Control Module, potentially costing several hundred to over a thousand dollars.

Can I reset the P1FC7 code after repairs?

Yes, after repairs are completed, you can reset the P1FC7 code using an OBDII scanner to clear the trouble codes and check if the issue has been resolved.