AutoCodes – Buick – P1FDF Buick

P1FDF Buick Code - Hybrid/EV Battery Interface Control Module 1 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: P1FDF Buick indicates Hybrid/EV Battery Interface Control Module 1 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 705

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 P1FDF 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 P1FDF Buick - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage - AutoCodes.com — P1FDF Buick Code - Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDF 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 P1FDF 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 P1FDF 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 P1FDF Buick Code

1. What are the common symptoms of OBDII code P1FDF in a Buick Hybrid/EV vehicle?

- The common symptoms include the check engine light being illuminated, decreased fuel efficiency, reduced engine power, and potential issues with the hybrid/EV system.

2. What causes the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage code in a Buick?

- This code is typically triggered by a fault in the hybrid/EV battery interface control module, a high voltage sensor circuit malfunction, or issues with the hybrid battery system.

3. How serious is the P1FDF code in a Buick Hybrid/EV vehicle?

- This code should be addressed promptly as it can affect the performance and efficiency of the hybrid/EV system. Ignoring the issue may lead to further complications and potential damage to the vehicle.

4. Can I continue driving my Buick with the P1FDF code present?

- It is not recommended to continue driving the vehicle with the code active, as it can lead to further damage and potentially unsafe driving conditions. It is best to have the vehicle inspected and repaired by a qualified technician.

5. How can I diagnose and repair the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage code in my Buick?

- Diagnosing and repairing this code requires specialized diagnostic equipment and expertise. It is recommended to take your vehicle to a qualified mechanic or dealership for proper diagnosis and repair.

6. Are there any DIY tips for troubleshooting the P1FDF code in a Buick Hybrid/EV vehicle?

- DIY troubleshooting for this code is not recommended due to the complex nature of hybrid/EV systems. It is best to leave diagnosis and repair to professionals with the necessary training and tools.

7. Is the repair for the P1FDF code covered under warranty for Buick Hybrid/EV vehicles?

- Depending on the age and mileage of the vehicle, the repair may be covered under the manufacturer's warranty. It is advisable to check with your Buick dealership or refer to your warranty documentation for more information.

8. Can a faulty hybrid/EV battery cause the P1FDF code to appear in a Buick?

- Yes, a faulty hybrid/EV battery or related components can contribute to triggering the P1FDF code. Proper diagnosis by a qualified technician is necessary to determine the exact cause of the issue.

9. How long does it typically take to repair the Hybrid/EV Battery Interface Control Module 1 Voltage Sensor Circuit High Voltage code in a Buick?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. It is recommended to consult with your mechanic for a more accurate estimate of the repair timeline.

10. Are there any preventive maintenance measures to avoid encountering the P1FDF code in a Buick Hybrid/EV vehicle?

- Regular maintenance of the hybrid/EV system, including scheduled inspections and battery health checks, can help prevent issues that may trigger the P1FDF code. Following the manufacturer's recommended maintenance schedule is key to keeping the system in good condition.