AutoCodes – Buick – P1FD7 Buick

P1FD7 Buick Code - Hybrid/EV Battery Interface Control Module 3 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: P1FD7 Buick indicates Hybrid/EV Battery Interface Control Module 3 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 716

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 P1FD7 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 P1FD7 Buick - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FD7 Buick Code - Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FD7 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 P1FD7 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 P1FD7 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 P1FD7 Buick Code

1. What are common symptoms of OBDII code P1FD7 in a Buick Hybrid/EV vehicle?

- Common symptoms include the check engine light being illuminated, reduced hybrid/EV system performance, and potential issues with the battery interface control module.

2. What can cause the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit to have low voltage in a Buick?

- Low voltage in this circuit can be caused by a faulty voltage sensor, damaged wiring, loose connections, or issues with the hybrid/EV battery itself.

3. How serious is the P1FD7 OBDII code in a Buick Hybrid/EV vehicle?

- This code should be addressed promptly to prevent potential damage to the hybrid/EV system and ensure proper operation of the vehicle.

4. Can I continue driving my Buick with the P1FD7 code present?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further complications with the hybrid/EV system.

5. How can I diagnose and repair the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit low voltage issue in my Buick?

- Diagnosis typically involves checking the voltage sensor, inspecting wiring and connections, and testing the hybrid/EV battery. Repairs may involve replacing the sensor, repairing wiring, or addressing battery issues.

6. Will resetting the OBDII code P1FD7 in my Buick make the problem go away?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the low voltage in the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit.

7. How much does it cost to repair the P1FD7 code in a Buick Hybrid/EV vehicle?

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

8. Are there any recalls or technical service bulletins related to the P1FD7 code in Buick Hybrid/EV models?

- It is recommended to check with Buick or a certified dealership to inquire about any recalls or technical service bulletins related to this specific OBDII code.

9. Can a DIY enthusiast with automotive experience fix the P1FD7 code issue in a Buick Hybrid/EV vehicle?

- While some simple checks and repairs can be done by DIY enthusiasts, diagnosing and repairing the specific issue causing the P1FD7 code may require specialized tools and expertise best handled by a professional mechanic.

10. How often does the Hybrid/EV Battery Interface Control Module 3 Voltage Sensor Circuit low voltage issue occur in Buick vehicles?

- While not extremely common, issues with the voltage sensor circuit can occur in Buick Hybrid/EV vehicles, especially as the vehicle ages or if maintenance is neglected.