AutoCodes – Cadillac – P1FE2 Cadillac

P1FE2 Cadillac Code - Hybrid/EV Battery Interface Control Module 4 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: P1FE2 Cadillac indicates Hybrid/EV Battery Interface Control Module 4 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 884

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 P1FE2 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 P1FE2 Cadillac - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FE2 Cadillac Code - Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FE2 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 P1FE2 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 P1FE2 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 P1FE2 Cadillac Code

1. What are the common symptoms of OBDII code P1FE2 in a Cadillac Hybrid/EV vehicle?

- Common symptoms of this code may include the check engine light illuminating, reduced hybrid system performance, and potential drivability issues.

2. What can cause the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit to register high voltage?

- The high voltage reading in this circuit can be caused by a faulty voltage sensor, wiring issues, or problems within the hybrid/EV battery interface control module.

3. How serious is the P1FE2 code related to the Hybrid/EV Battery Interface Control Module in a Cadillac?

- This code should be addressed promptly to prevent potential damage to the hybrid system components and ensure the vehicle's safe operation.

4. Can I continue driving my Cadillac with the P1FE2 code present?

- It is not recommended to continue driving the vehicle with this code active, as it can lead to further issues and potentially impact the performance of the hybrid/EV system.

5. How can I diagnose and repair the high voltage sensor circuit issue causing the P1FE2 code?

- Diagnosing and repairing this issue typically involves inspecting the voltage sensor, checking wiring connections, and potentially replacing the sensor or addressing any wiring faults.

6. Will resetting the OBDII code P1FE2 clear the issue permanently?

- Simply resetting the code may temporarily clear the check engine light, but it will not fix the underlying problem causing the high voltage sensor circuit issue.

7. Can a DIY enthusiast fix the P1FE2 code on their Cadillac Hybrid/EV vehicle?

- While some basic diagnostic steps can be taken by a DIY enthusiast, diagnosing and repairing the specific components related to this code may require specialized tools and expertise.

8. Are there any recalls or technical service bulletins related to the P1FE2 code in Cadillac vehicles?

- It's recommended to check with your local Cadillac dealership or the manufacturer's website for any recalls or technical service bulletins related to this specific OBDII code.

9. How much can I expect to pay for repairing the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit issue?

- The cost of repairing this issue can vary depending on the extent of the problem, the need for replacement parts, and the labor rates of the repair shop or dealership.

10. How often does the P1FE2 code related to the Hybrid/EV Battery Interface Control Module occur in Cadillac vehicles?

- The occurrence of this specific OBDII code can vary, but it is relatively rare compared to more common codes seen in traditional gasoline-powered vehicles.