AutoCodes – Cadillac – P1FC7 Cadillac

P1FC7 Cadillac 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 Cadillac 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 954

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

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 Cadillac?

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 Cadillac 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 Cadillac Code

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

The code P1FC7 indicates an issue with the Hybrid/EV Battery Interface Control Module 9's 5-volt reference circuit, which may affect vehicle performance or hybrid system functionality.

2. What are common symptoms of the P1FC7 code?

Symptoms include a check engine light, reduced hybrid system performance, limited power mode, or warnings related to the hybrid battery system.

3. What causes the P1FC7 code to appear?

Common causes include a faulty Hybrid/EV Battery Interface Control Module, damaged or corroded wiring in the 5V reference circuit, or a short circuit.

4. Can I drive my Cadillac with a P1FC7 code?

Driving with this code is not recommended, as it may lead to reduced performance, potential hybrid system failure, or further damage to the electrical components.

5. How is the P1FC7 code diagnosed?

A technician will use an OBDII scanner to confirm the code, inspect the 5V reference circuit for shorts or damage, and test the functionality of the Hybrid/EV Battery Interface Control Module.

6. What repairs are commonly needed for the P1FC7 code?

Repairs may include replacing the Hybrid/EV Battery Interface Control Module, repairing or replacing damaged wiring, or addressing any short circuits in the 5V reference circuit.

7. How much does it cost to fix the P1FC7 code?

The repair cost varies widely depending on the issue, but replacing the control module could range from $500 to $1,500, not including labor.

8. Can a loose connection cause the P1FC7 code?

Yes, a loose or corroded connection in the 5V reference circuit can trigger this code and should be inspected during diagnostics.

9. Is the P1FC7 code specific to Cadillac vehicles?

The P1FC7 code is specific to General Motors vehicles, including Cadillac models, particularly those with hybrid or EV systems.

10. How can I prevent the P1FC7 code from recurring?

Regular maintenance, inspecting wiring for damage or corrosion, and ensuring secure electrical connections can help prevent this code from reappearing.