AutoCodes – Cadillac – P1FE4 Cadillac

P1FE4 Cadillac Code - Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage

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: P1FE4 Cadillac indicates Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage.
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 848

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 P1FE4 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 P1FE4 Cadillac - Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE4 Cadillac Code - Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE4 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 P1FE4 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 P1FE4 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 P1FE4 Cadillac Code

1. What are the common symptoms of OBDII code P1FE4 in a Cadillac Hybrid/EV?

- Common symptoms include the check engine light illuminating, reduced hybrid/EV performance, and potential issues with battery charging.

2. What are the possible causes of the Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage code in a Cadillac?

- Possible causes include a faulty battery interface control module, damaged wiring or connectors, high voltage sensor malfunction, or issues with the hybrid/EV battery system.

3. How can I diagnose the P1FE4 code in my Cadillac Hybrid/EV?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the battery interface control module and related components, and testing the voltage sensor circuit for proper operation.

4. Is it safe to continue driving my Cadillac with the P1FE4 code present?

- It is not recommended to continue driving with this code as it can lead to further damage to the hybrid/EV system. It is best to have the issue diagnosed and repaired as soon as possible.

5. Can I repair the Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage issue myself?

- Repairing this issue may require specialized knowledge and tools, so it is recommended to have a qualified technician or dealership address the problem to ensure proper diagnosis and repair.

6. How much does it typically cost to fix the P1FE4 code in a Cadillac Hybrid/EV?

- Repair costs can vary depending on the exact cause of the issue, but it may involve replacing the battery interface control module, repairing damaged wiring, or addressing voltage sensor problems. Costs can range from a few hundred to over a thousand dollars.

7. Are there any preventive measures I can take to avoid the P1FE4 code in my Cadillac?

- Regular maintenance of the hybrid/EV system, including checking for loose connections, monitoring battery health, and addressing any warning signs promptly, can help prevent issues that lead to the P1FE4 code.

8. Will resetting the OBDII code P1FE4 in my Cadillac make the issue go away?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the P1FE4 code. It is important to diagnose and repair the issue to prevent further issues.

9. Can a faulty hybrid/EV battery cause the P1FE4 code to appear in a Cadillac?

- Yes, a faulty hybrid/EV battery or related components can contribute to the P1FE4 code appearing due to issues with voltage sensor readings and control module communication.

10. How long does it typically take to repair the Hybrid/EV Battery Interface Control Module 6 Voltage Sensor Circuit High Voltage issue in a Cadillac?

- Repair times can vary depending on the exact cause of the problem and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the issue.