AutoCodes – GMC – P1FC7 GMC

P1FC7 GMC 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 GMC 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 898

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

1. What does the OBDII code P1FC7 mean on a GMC vehicle?

The P1FC7 code indicates an issue with the 5V reference circuit for the Hybrid/EV Battery Interface Control Module 9, which may impact the hybrid or electric vehicleâ€™s battery system.

2. What are the common symptoms of the P1FC7 code in a GMC vehicle?

Symptoms may include an illuminated check engine light, decreased hybrid or EV performance, limited power mode, or communication errors with the battery system.

3. What causes the P1FC7 code to appear?

This code can be caused by a short or open circuit in the 5V reference wiring, a faulty Hybrid/EV Battery Interface Control Module, or an issue with the powertrain control module (PCM).

4. How serious is the P1FC7 code?

The P1FC7 code is moderately serious as it can affect the performance of the hybrid or EV battery system. It should be diagnosed and repaired promptly to avoid further issues.

5. How can I diagnose the P1FC7 code on my GMC vehicle?

Diagnosis involves inspecting the 5V reference circuit for shorts, opens, or damage, testing the Hybrid/EV Battery Interface Control Module, and verifying proper communication with the PCM.

6. Can I drive my GMC with the P1FC7 code?

While the vehicle may still be drivable, itâ€™s not recommended as the code could lead to reduced performance or further damage to the hybrid/EV battery system.

7. What repairs can fix the P1FC7 code?

Repairs may include repairing or replacing damaged wiring in the 5V reference circuit, replacing the Hybrid/EV Battery Interface Control Module, or reprogramming/updating the PCM.

8. How much does it cost to fix the P1FC7 code in a GMC vehicle?

The repair cost can vary depending on the diagnosis, but it typically ranges from $200 to $1,000, depending on whether a module or wiring needs replacement.

9. Can a low-voltage battery cause the P1FC7 code?

Yes, a weak or failing 12V auxiliary battery can sometimes contribute to communication issues or voltage irregularities, potentially triggering this code.

10. Do I need special tools to fix the P1FC7 code?

Yes, diagnosing and repairing this code often requires professional-grade OBDII scan tools, a multimeter, and potentially hybrid/EV-specific diagnostic equipment.