AutoCodes – Buick – P1FDB Buick

P1FDB Buick Code - Hybrid/EV Battery Interface Control Module 7 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: P1FDB Buick indicates Hybrid/EV Battery Interface Control Module 7 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 721

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 P1FDB 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 P1FDB Buick - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit Low Voltage - AutoCodes.com — P1FDB Buick Code - Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1FDB 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 P1FDB 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 P1FDB 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 P1FDB Buick Code

1. What are the common symptoms of OBDII code P1FDB in a Buick Hybrid/EV vehicle?

- Common symptoms include reduced fuel efficiency, loss of power, illuminated check engine light, and potential issues with the hybrid/EV system.

2. What could cause the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit Low Voltage code in a Buick?

- Possible causes of this code include a faulty voltage sensor, wiring issues, a weak battery, or problems with the hybrid/EV battery interface control module.

3. How can I diagnose the low voltage sensor circuit issue in my Buick Hybrid/EV vehicle?

- Diagnose the issue by using a scan tool to retrieve the specific code, inspecting the wiring for damage, testing the voltage sensor, and checking the battery health.

4. Is it safe to continue driving my Buick with the P1FDB code related to the voltage sensor circuit?

- It is not recommended to drive the vehicle with this code as it can lead to further damage to the hybrid/EV system and potentially cause safety concerns.

5. Can I repair the low voltage sensor circuit issue in my Buick Hybrid/EV vehicle myself?

- While some basic diagnostics can be performed at home, it is recommended to have a qualified technician diagnose and repair the issue due to the complexity of hybrid/EV systems.

6. How much does it typically cost to repair the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit Low Voltage issue in a Buick?

- Repair costs can vary depending on the exact cause of the issue, but it may range from a few hundred dollars for sensor replacement to over a thousand dollars if more extensive repairs are needed.

7. Will resetting the OBDII code P1FDB in my Buick make the issue go away temporarily?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear once the problem persists.

8. How important is it to address the P1FDB code in a timely manner for a Buick Hybrid/EV vehicle?

- It is crucial to address the code promptly to prevent further damage to the hybrid/EV system, ensure optimal vehicle performance, and maintain overall safety while driving.

9. Are there any preventive maintenance steps I can take to avoid the Hybrid/EV Battery Interface Control Module 7 Voltage Sensor Circuit Low Voltage issue in my Buick?

- Regularly inspecting the hybrid/EV system components, ensuring proper battery maintenance, and promptly addressing any warning signs can help prevent such issues.

10. Can the P1FDB code related to the voltage sensor circuit affect the overall drivability of my Buick Hybrid/EV vehicle?

- Yes, the code can impact drivability by causing performance issues, reduced fuel efficiency, and potentially disabling the hybrid/EV system, leading to a less than optimal driving experience.