AutoCodes – Buick – P1FE1 Buick

P1FE1 Buick 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 Buick 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 852

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

1. What are the common symptoms of OBDII code P1FE1 in a Buick Hybrid/EV?

- Common symptoms include the check engine light illuminating, reduced fuel efficiency, and potential drivability issues.

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

- Possible causes include a faulty voltage sensor, wiring issues, a malfunctioning battery control module, or a problem with the high voltage battery itself.

3. How can I diagnose the OBDII code P1FE1 in my Buick Hybrid/EV?

- Diagnosis typically involves using a scan tool to read the code and then performing further testing on the voltage sensor, wiring, and related components to identify the root cause.

4. Is it safe to continue driving my Buick with the P1FE1 code present?

- It is not recommended to drive the vehicle with this fault code, as it could lead to further damage to the hybrid/EV system. It's best to address the issue promptly.

5. Can I repair the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit High Voltage issue myself?

- While some DIY enthusiasts may attempt to address this code, it is recommended to have a professional technician with experience in hybrid/EV systems diagnose and repair the issue.

6. How much does it typically cost to repair the P1FE1 code in a Buick Hybrid/EV?

- The cost of repairs can vary depending on the exact cause of the fault. It's best to consult a mechanic for an accurate diagnosis and cost estimate.

7. Are there any preventive maintenance measures to avoid the OBDII code P1FE1 in a Buick Hybrid/EV?

- Regular maintenance of the hybrid/EV system, including checking the battery components and wiring, can help prevent issues that may trigger this fault code.

8. Can a low-voltage battery issue trigger the P1FE1 code in a Buick Hybrid/EV?

- Yes, a low-voltage battery or charging system problem could potentially lead to this fault code being triggered in the hybrid/EV system.

9. Will resetting the fault code clear the issue permanently?

- Simply clearing the fault code may temporarily turn off the check engine light, but the underlying issue causing the code will persist unless properly diagnosed and repaired.

10. What are the long-term consequences of ignoring the OBDII code P1FE1 in a Buick Hybrid/EV?

- Ignoring this fault code could lead to further damage to the hybrid/EV system, potentially resulting in more costly repairs down the line. It's best to address the issue promptly.