AutoCodes – Generic – P1FC8

P1FC8 Code - Hybrid/EV Battery Interface Control Module 10 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: P1FC8 indicates Hybrid/EV Battery Interface Control Module 10 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 856

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 P1FC8 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 P1FC8 - Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit - AutoCodes.com — P1FC8 Code - Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit

What does this mean?

What are the Possible Causes of the DTC P1FC8?

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 P1FC8?

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 P1FC8 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

P1FC8 Buick — Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit
P1FC8 Cadillac — Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit
P1FC8 Chevrolet — Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit
P1FC8 GMC — Hybrid/EV Battery Interface Control Module 10 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 P1FC8 Code

1. What are the common symptoms of OBDII code P1FC8 related to the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

Common symptoms include poor hybrid system performance, reduced fuel efficiency, and potential issues with the electric vehicle (EV) battery.

2. What are the possible causes of OBDII code P1FC8 related to the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

Potential causes may include a faulty hybrid/EV battery interface control module, damaged wiring or connectors in the 10 5 V reference circuit, or issues with the power supply to the circuit.

3. How can I diagnose the OBDII code P1FC8 linked to the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

Diagnosis involves using a scan tool to retrieve the specific code, inspecting the wiring and connectors in the 10 5 V reference circuit, and testing the hybrid/EV battery interface control module for proper functioning.

4. Are there any safety precautions to consider when working on the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

Yes, it is important to disconnect the vehicle's battery before performing any diagnostic or repair work to prevent electrical hazards and ensure safety.

5. Can I repair the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit issue myself?

While some basic diagnosis and inspection can be done by DIY enthusiasts, complex repairs involving the hybrid/EV system should be handled by experienced technicians familiar with hybrid vehicles.

6. Will driving with OBDII code P1FC8 present cause further damage to my vehicle?

Continued driving with the code present may lead to reduced performance, decreased fuel efficiency, and potential damage to the hybrid/EV system components over time. It is best to address the issue promptly.

7. How much does it typically cost to repair OBDII code P1FC8 related to the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

The cost of repair can vary depending on the specific cause of the issue, parts needed, and labor rates. It is recommended to obtain quotes from reputable repair shops for an accurate estimate.

8. Can resetting the OBDII code P1FC8 clear the issue related to the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem. Proper diagnosis and repair are necessary to address the issue effectively.

9. Are there any recalls or technical service bulletins related to OBDII code P1FC8 and the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit?

It is recommended to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code and system.

10. How can I prevent OBDII code P1FC8 issues with the Hybrid/EV Battery Interface Control Module 10 5 V Reference Circuit in the future?

Regular maintenance, including checking the hybrid/EV system components, wiring, and connectors, can help prevent issues related to the 10 5 V reference circuit and ensure the proper functioning of the system.