AutoCodes – Buick – P1FE2 Buick

P1FE2 Buick 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 Buick 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 727

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

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 Buick?

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 Buick 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 Buick Code

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

- Common symptoms include the hybrid/EV system malfunction indicator light illuminating, reduced hybrid/EV mode operation, and potential loss of power.

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

- The high voltage reading may be caused by a faulty battery voltage sensor, a wiring issue, or a problem with the interface control module itself.

3. How serious is the P1FE2 code in a Buick Hybrid/EV vehicle?

- The code P1FE2 indicates a high voltage sensor circuit issue, which can affect the performance and safety of the hybrid/EV system. It should be addressed promptly.

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

- It is not recommended to continue driving the vehicle with the P1FE2 code active, as it can lead to further damage to the hybrid/EV system.

5. What is the typical repair process for OBDII code P1FE2 in a Buick Hybrid/EV vehicle?

- The repair process usually involves diagnosing the specific cause of the high voltage reading, which may require testing the battery voltage sensor, checking wiring connections, and potentially replacing the interface control module.

6. How can I prevent the P1FE2 code from recurring in my Buick Hybrid/EV vehicle?

- Regular maintenance and inspections of the hybrid/EV system, including checking the battery voltage sensor and related components, can help prevent the code from recurring.

7. Are there any DIY repair tips for addressing the P1FE2 code in a Buick Hybrid/EV vehicle?

- DIY repairs for the P1FE2 code may be challenging due to the complexity of the hybrid/EV system. It is recommended to consult a professional mechanic with experience in hybrid vehicle repairs.

8. How much does it typically cost to repair the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit issue in a Buick?

- The cost of repairing the P1FE2 code can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Can the P1FE2 code be cleared/reset without fixing the underlying issue in a Buick Hybrid/EV vehicle?

- Clearing or resetting the code without addressing the underlying high voltage sensor circuit problem is not recommended, as the issue may persist and lead to further complications.

10. Is it safe to drive a Buick with the Hybrid/EV Battery Interface Control Module 4 Voltage Sensor Circuit showing high voltage?

- Driving a Buick with the P1FE2 code indicating high voltage can be risky, as it can impact the performance and safety of the hybrid/EV system. It is advisable to have the issue inspected and repaired as soon as possible.