AutoCodes – Buick – P1FDE Buick

P1FDE Buick Code - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low 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: P1FDE Buick indicates Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low 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 856

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 P1FDE 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 P1FDE Buick - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FDE Buick Code - Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDE 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 P1FDE 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 P1FDE 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 P1FDE Buick Code

1. What are the common symptoms of OBDII code P1FDE in a Buick Hybrid/EV vehicle?

- Common symptoms include issues with the hybrid/EV battery performance, decreased fuel efficiency, and potential drivability issues.

2. What can cause the Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage error in a Buick?

- The error can be caused by a faulty voltage sensor, wiring issues, a weak battery, or problems with the hybrid/EV battery control module.

3. How serious is the P1FDE code in a Buick Hybrid/EV vehicle?

- The code indicates a low voltage issue in the hybrid/EV battery system, and it is crucial to address it promptly to prevent further damage to the vehicle's electrical components.

4. How can I diagnose the Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage error in my Buick?

- Diagnosis involves using an OBDII scanner to read the code, inspecting the battery voltage sensor, checking the wiring for any damage, and testing the battery's voltage levels.

5. Can I still drive my Buick with the P1FDE code present?

- It is not recommended to drive the vehicle with the code active, as it may lead to further electrical issues and potential damage to the hybrid/EV system.

6. What are some repair tips for fixing the Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage issue in a Buick?

- Repair tips include checking and replacing the voltage sensor, repairing any damaged wiring, ensuring the battery is in good condition, and resetting the error code after repairs.

7. Will resetting the error code make the issue go away permanently?

- Resetting the code may clear it temporarily, but if the underlying issue causing the P1FDE code is not fixed, it is likely to reoccur.

8. How much can I expect to pay for repairing the Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage error in a Buick?

- Repair costs can vary depending on the exact cause of the issue, but it is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

9. Is it possible to prevent the P1FDE code from appearing in the future?

- Regular maintenance of the hybrid/EV system, including checking the battery health and monitoring voltage levels, can help prevent the recurrence of the P1FDE error code.

10. Can I fix the Hybrid/EV Battery Interface Control Module 10 Voltage Sensor Circuit Low Voltage issue in my Buick at home?

- While some DIY enthusiasts may attempt to address the issue themselves, it is recommended to seek professional help to ensure proper diagnosis and repair of the hybrid/EV system.