AutoCodes – Cadillac – P1FE1 Cadillac

P1FE1 Cadillac Code - Hybrid/EV Battery Interface Control Module 3 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: P1FE1 Cadillac indicates Hybrid/EV Battery Interface Control Module 3 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 757

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 P1FE1 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 P1FE1 Cadillac - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE1 Cadillac Code - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE1 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 P1FE1 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 P1FE1 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 P1FE1 Cadillac Code

1. What are the common symptoms of OBDII code P1FE1 in a Cadillac hybrid/EV vehicle?

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

2. What can cause the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage fault code in a Cadillac?

- The code P1FE1 can be triggered by a faulty Hybrid/EV Battery Interface Control Module, issues with high voltage sensors, wiring problems, or a malfunctioning battery pack.

3. How serious is the P1FE1 fault code in a Cadillac hybrid/EV vehicle?

- The P1FE1 code should be addressed promptly as it can affect the performance and safety of the hybrid/EV system, leading to potential drivability issues and reduced fuel efficiency.

4. Can I still drive my Cadillac with the P1FE1 code present?

- It is not recommended to continue driving the vehicle with the P1FE1 code illuminated, as it may result in further damage to the hybrid/EV system.

5. How can I diagnose and repair the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage issue in my Cadillac?

- Diagnosis typically involves using a scan tool to retrieve the specific fault codes, followed by inspecting the high voltage sensors, wiring harness, and battery interface control module for any visible damage. Repair may involve replacing faulty components or addressing wiring issues.

6. Is it safe to attempt DIY repairs for the P1FE1 code in a Cadillac hybrid/EV vehicle?

- Due to the high voltage nature of hybrid/EV systems, it is recommended to have repairs for the P1FE1 code performed by a qualified technician with experience in handling hybrid vehicles.

7. How much does it cost to fix the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage fault in a Cadillac?

- Repair costs for the P1FE1 fault can vary depending on the exact cause of the issue, but it is advisable to budget for potentially significant expenses related to sensor replacements or module repairs.

8. Can resetting the fault codes clear the P1FE1 code in a Cadillac?

- While clearing the fault codes may temporarily reset the check engine light, the underlying issue causing the P1FE1 code will likely need to be diagnosed and repaired to prevent it from reoccurring.